Abstract: A traffic signal recognition apparatus acquires image data by imaging the surroundings of a vehicle, detects a self-position of the vehicle, and detects, in the image, a traffic signal around the vehicle. The traffic signal recognition apparatus identifies two or more of the traffic signal predicted to be captured in the image, based on information on the self-position and map information containing positional information on the traffic signals, and assigns a priority level to each of the two or more traffic signals thus identified, based on a possibility of the traffic signal being blocked out of sight. When the two or more traffic signals are identified, the traffic signal detected in the image is a traffic signal with a highest priority level among the two or more traffic signals.

Abstract: A separator of a fuel cell to be laminated while sandwiching a membrane electrode assembly forming a power generation region includes a source connection point tab for inputting and outputting an alternating current for internal resistance measurement, a sense connection point tab for detecting a potential of the alternating current input and output to and from the source connection point tab and separation portion configured to separate the sense connection point tab from a current path of the alternating current for internal resistance measurement from the source connection point tab to the power generation region.

Abstract: An induction motor control apparatus controls an induction motor connected to drive wheels by setting a motor torque command value on the basis of vehicle information. The induction motor control apparatus calculates a first torque current command value and a first excitation current command value on the basis of the motor torque command value and estimates a rotor magnetic flux on the basis of the first excitation current command value. The induction motor control apparatus calculates a first torque command value on the basis of an estimated value of the rotor magnetic flux and the first torque current command value. Further the induction motor control apparatus calculates a second torque command value by applying filter processing to the first torque command value, a natural vibration frequency component of a drive shaft torque transmission system in a vehicle being removed in the filter processing.

Abstract: A battery charger is provided on which power conversion components for converting commercial power to direct current (DC) power are mounted. The power conversion components include a power breaker for switching input alternate current (AC) power on/off, a power conversion circuit for converting the input AC power to a predetermined AC power, a voltage conversion circuit for converting the predetermined AC power to a predetermined voltage, and a rectifier circuit for converting the AC power that has been converted to the predetermined voltage to DC power. The power conversion components are mounted on a core frame, and an outer housing is mounted to the core frame in a manner so as to cover the core frame. The power breaker, the power conversion circuit, the rectifier circuit, and the voltage conversion circuit are mounted in this order to the core frame.

Abstract: A vehicle grill shutter system comprising at least one grill shutter and a controller. The grill shutter is movably coupled to a vehicle at a location forward of a radiator of the vehicle. The grill shutter comprises first and second portions. The first portion has a first surface and includes a first material having a first porosity, and the second portion has a second surface and includes a second material having a second porosity which is less porous than the first porosity. The controller is configured to operate the grill shutter, in response to a detected vehicle condition pertaining to the vehicle, to move between a first position at which the first surface is oriented transverse to a flow direction of air entering a grill of the vehicle toward the radiator and a second position at which the second surface is oriented transverse to the flow direction.

Abstract: An ion exchanger configured to remove an impurity ion of a coolant for cooling a fuel cell, the ion exchanger includes an inflow portion having an inflow path where the coolant enters, a discharge portion having a discharge path for discharging the coolant, an outer casing having an upstream end where the inflow portion is provided and a downstream end where the discharge portion is provided, an inner casing housed inside the outer casing, an outer path formed between the inner casing and the outer casing to cause the inflow path and the discharge path to communicate with each other, and an inner path that is formed inside the inner casing to cause the inflow path and the discharge path to communicate with each other and is configured to enclose an ion exchange resin capable of removing an impurity ion of the coolant. The inner casing has a through-hole that causes the inner path end the outer path to communicate with each other.

Abstract: A vehicle power supply device includes: a plug socket to supply an external device with electrical power; and an external output switch configured to be switched between an on state in which the electrical power is supplied from a battery to the plug socket and an off state in which the supply of the electrical power is stopped. In a case where the external output switch is in the on state, when the vehicle transitions from a ready mode to an OFF mode, the switch control unit sets the external output switch to the off state along with the transition, and when the vehicle transitions from an ACC mode or an ON mode to the OFF mode, the switch control unit maintains the on state of the external output switch.

Abstract: A vehicular acceleration suppression device reduces the degradation in the drive performance due to the acceleration suppression control activated outside the parking region. A parking frame line candidate which is a candidate of a parking frame line is extracted from a bird's-eye view image acquired by performing a bird's-eye view conversion on a captured image around a vehicle, and a parking frame line candidate corresponding line corresponding the parking frame line candidate is extracted from the captured image of the front of the vehicle. Then, the parking frame line candidate corresponding to the parking frame line candidate corresponding line length of which is longer than a parking frame line length threshold is eliminated from the candidate to be detected as the parking frame.

Abstract: A vehicle seat structure having a seat back section, a latch mechanism and a striker member. The latch mechanism is connected to the seat back section. The striker member has a first attachment end, a striker bar portion, a serpentine portion and a second attachment end. The striker bar portion is located between the first attachment end and the serpentine portion. The serpentine portion is located between the striker bar portion and the second attachment end. The first and second attachment ends are adapted to be attached to an upright rear wall of the passenger compartment. The striker bar portion is configured to releasably engage the latch mechanism to limit movement of the seat back section with respect to the rear wall of the passenger compartment. The serpentine portion is configured to deform in response to application of force to the seat back section in excess of a predetermined level of force.

Abstract: A control apparatus for a hybrid vehicle includes a coast stop control section (60) which stops a fuel supply to an engine (E) when a vehicle speed is equal to or lower than a predetermined vehicle speed, an accelerator pedal is not depressed, a brake pedal is depressed, and a select position of a continuously variable transmission (1) is in a traveling position; and a low return control section (50) for retuning a transmission ratio of the continuously variable transmission (1) to a low side after the engine (E) is restarted in a case where the transmission gear ratio of the continuously variable transmission (1) is a midway ratio which is higher than a predetermined transmission gear ratio, when detecting that the coast stop control section (60) is operated and the vehicle is stopped.

Abstract: A hybrid vehicle includes a mechanical oil pump that is driven by an engine and an electric oil pump that is driven by an electric motor, and is configured to activate the electric oil pump when traveling in an electric traveling mode, in which the engine is stopped and traveling is executed by a driving force from a driving motor.

Abstract: A driving assistance device for a vehicle includes an object detection section for detecting objects present on the periphery of an own vehicle and determines whether the own vehicle is located within a predetermined region from an intersection. The driving assistance device extracts, from the detected objects, a first moving object which may come into collision with the own vehicle as the own vehicle enters the intersection. The driving assistance device extracts, from the detected objects, a second moving object crossing a road on which the first moving object is traveling between the own vehicle and the first moving object, and acquires motion information of the second moving object crossing the intersection. The driving assistance device determines that the own vehicle can enter the intersection when acquiring the motion information of the second moving object.

Abstract: A method and apparatus for generating projected vehicle transportation network information representing an intersection for use in traversing a vehicle transportation network may include receiving a remote vehicle message including remote vehicle information indicating remote vehicle geospatial state information and remote vehicle kinematic state information, identifying host vehicle information including host vehicle geospatial state information and host vehicle kinematic state information, generating projected vehicle transportation network information representing a portion of the vehicle transportation network including an intersection based on the remote vehicle information and the host vehicle information, and traversing the intersection represented by the projected vehicle transportation network information using the projected vehicle transportation network information.

Abstract: A multi-link engine is provided with an upper link, a lower link and a control link. The upper link is pivotally connected to a piston by a piston pin. The lower link is rotatably mounted on a crankpin of a crankshaft and connected to the upper link by an upper pin. The control link is rotatably connected to the lower link by a control pin and pivotally mounted on a pivot portion of a control shaft. The links are configured and arranged with respect to each other such that inertia forces of a prescribed second or higher order in terms of an engine rotational speed act on at least the upper link and the control link in a transverse direction of the engine with a sum of leftward and rightward inertia forces of the prescribed second or higher order being substantially zero.

Abstract: In a vehicle with an automatic transmission, an internal combustion engine is provided with a variable compression ratio mechanism. A target compression ratio of the variable compression ratio mechanism is determined based on a demand load and an engine rotation speed with reference to a compression ratio map. A reverse-drive compression ratio map is selected when the automatic transmission is in a reverse drive position; a first compression ratio map is selected when an actual speed reduction ratio of the transmission is low; and a second compression ratio map is selected when the actual speed reduction ratio of the transmission is high. A variable control range of the compression ratio is narrower in the second compression ratio map than in the first compression ratio map and is narrower in the reverse-drive compression ratio map than in the first and second compression ratio maps.

Abstract: A parking assistance system includes: a light source provided at a parking position at which a power transmission coil is provided, and configured to emit light; at least two light reception units mounted away from each other on a vehicle including a power reception coil, and each configured to receive the light emitted from the light source by using a position sensitive detector; an incident-angle calculation unit configured to calculate the incident angle of the light on each of the light reception units; a distance calculation unit configured to calculate the distance between the parking position and the vehicle from the incident angles of the light on the light reception units; and a detection unit configured to detect that the vehicle has approached the parking position. The light volume of the light source is reduced when the vehicle has approached the parking position.

Abstract: A wet state control device for fuel cell includes a priority control unit for preferentially controlling either one of a pressure and a flow rate of cathode gas when a wet state of a fuel cell is adjusted, a water temperature control unit for controlling a temperature of cooling water when the wet state of the fuel cell is not completely adjustable by a control of the priority control unit, and a complementary control unit for controlling the other of the pressure and the flow rate of the cathode gas to complement a response delay of the water temperature control unit.

Abstract: A vehicle intersection monitoring method includes exchanging host vehicle information and remote vehicle information between a host vehicle and a remote vehicle, identifying a road intersection based on at least one of the host vehicle information and the remote vehicle information, and selecting an intersection scenario from a plurality of intersection scenarios based on the host vehicle information and the remote vehicle information. The method further includes monitoring, by operation of a processor, a location relationship between the host vehicle and the remote vehicle according to an algorithm that is determined based on the selected intersection scenario, to determine whether a possibility of contact between the host vehicle and the remote vehicle exists proximate to the intersection, and performing a threat mitigation operation while the possibility of contact exists.

Abstract: A fuel cell system comprises a compressor configured to supply the cathode gas to the fuel cell, an intercooler provided downstream of the compressor and configured to cool the cathode gas discharged from the compressor, a pressure regulating valve configured to adjust a pressure downstream of the intercooler, and a controller. The controller computes a first target pressure of the intercooler downstream pressure according to a target output of the fuel cell and computes a second target pressure of the intercooler downstream pressure according to the intercooler downstream temperature. Then, the controller sets smaller one of the first and second target pressures as a target pressure of the intercooler downstream pressure and controls the compressor and the pressure regulating valve according to the target pressure.

Abstract: A host vehicle receives a remote vehicle message via a wireless electronic communication link. The remote vehicle message includes remote vehicle information indicating remote vehicle geospatial state information and remote vehicle kinematic state information that includes at least a remote heading angle for a remote vehicle. Host vehicle information is identified that includes host vehicle geospatial state information and host vehicle kinematic state information that includes at least a host heading angle for the host vehicle. Projected vehicle transportation network information representing a portion of the vehicle transportation network is generated based on the remote and host vehicle information, the portion including a curved path having a substantially constant radius.

Abstract: A part has separator layers of resin laminated on each other with heat-resistant layers interposed among them and a sheath (laminated sheet) laid on each side of the laminated separator layers. The part is held, pressurized, and vibrated by a pressure vibrator and a jig receiver. The pressure vibrator and jig receiver are provided with projections that pressurize, vibrate, and break the heat-resistant layers, thereby melting and welding together the resin of the separator layers at the broken part.

Abstract: Wettability of positive and negative electrode active material layers is improved by having the ratio of the liquid absorption speed of an electrolyte to the positive and negative electrode active material layers in an appropriate range when an aqueous binder is used in the negative electrode active material layer. The non-aqueous electrolyte secondary battery has a power generating element having a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer containing an aqueous binder on a surface of a negative electrode current collector, and a separator, and Tc/Ta is in the range of 0.6 to 1.3 when Tc is the soak-in time of the electrolyte liquid into the positive electrode active material layer and Ta is the soak-in time of the electrolyte liquid into the negative electrode active material layer.

Abstract: A shared vehicle management device for managing shared vehicles used by users, including a rental request acquisition unit configured to acquire a rental request by the user, a vehicle state acquisition unit configured to acquire state information of the shared vehicle, a rental determination unit configured to determine a necessity level of maintenance of the shared vehicle on a basis of the state information of the shared vehicle, and determine whether to prohibit or permit a rental of the shared vehicle with the state information of the shared vehicle and the rental request by the user, and a recommended destination selection unit configured to determine that the shared vehicle needs maintenance upon a determination that the necessity level of maintenance of the shared vehicle is higher than a predetermined reference value when the rental determination unit determines whether to prohibit or permit the rental of the shared vehicle.

Abstract: In the present invention, a power conversion device is provided with an inverter for converting power output from a power source; a first power supply bus, connected to the positive electrode side of the inverter and the power source; a second power supply bus, connected to the negative electrode sides of the inverter and the power source; a first conductor that forms, along with the first power supply bus, a capacitor; a second conductor that forms, along with the second power supply bus, a capacitor; and a connection circuit, comprising a resistor, that electrically connects the first conductor and the second conductor.

Abstract: Provided is a power converter 3 that directly converts polyphase AC power to AC power. A converter circuit has a plurality of switching elements 311, 313, 315, 312, 314 and 316 which are connected to each phase R, S or T of the polyphase AC power to enable switching for turning on current-carrying bidirectionally. At least three condensers 821 to 826 are provided between phases of the converter circuit. The three condensers are respectively placed at apexes of a triangle on a plane that is in parallel with a part-mounting surface on which the switching elements are actually mounted. The wiring distance between the condensers and the switching elements can be shortened.

Abstract: A transmission controller searches a mechanical High, which is a minimum value of a possible speed ratio of the continuously variable transmission (CVT), based on an actual speed ratio, sets a control High lower than the mechanical High by a predetermined amount, and controls a speed ratio of the CVT by setting a minimum value of a speed ratio range of the CVT at the control High.

Abstract: A manufacturing device for a field pole magnet body includes a reference jig having reference surfaces in the lengthwise direction, width direction, and thickness direction for positioning a plurality of cleaved and divided magnet fragments in an aligned state. The manufacturing device further includes a first pressing means that presses the plurality of magnet fragments to the thickness direction reference surface from the thickness direction of a magnet body to align them in the thickness direction, and a second pressing means that presses the plurality of magnet fragments to the width direction reference surface from the width direction of the magnet body to align them in the width direction. An operational axis line of a pressing part of at least one of the first and second pressing means is arranged to be tilted such that it approaches the lengthwise direction reference surface at the side that abuts the magnet fragments.

Abstract: A non-contact power feeding apparatus including a power transmitting coil 5 receiving supply of electric power from an AC power supply, a power receiving coil 6 receiving electric power transmitted from the power transmitting coil 5 in a non-contacting manner, switching unit for switching connections with coils 61 to 63, output unit for outputting the electric power received from the power receiving coil 6 to a load 11 through the switching unit, and controller for controlling the switching unit. The power receiving coil 6 includes a plurality of coils 61 to 63 sharing their coil axes, the switching unit is connected to the coils 61 to 63 and switches polarity of the coils 61 to 63 in accordance with interlinkage magnetic flux passes through each of the coils 61 to 63.

Abstract: An impedance measuring device includes power supply means configured to output an alternating current to a positive electrode and a negative electrode of a laminated battery and detection means configured to detect at least one of an alternating-current potential difference between the positive electrode and an intermediate point of the laminated battery and an alternating-current potential difference between the negative electrode and the intermediate point of the laminated battery. The impedance measuring device includes computation means configured to compute an impedance of the laminated battery on the basis of the alternating-current potential difference detected by the detection means and the alternating current output from the power supply means, and an element having an impedance of a prescribed value necessary to calculate a measurement error of the impedance.

Abstract: An operator management device for managing work of an operator in a car sharing system that allows users to use shared vehicles allocated to stations includes a vehicle state acquisition unit configured to acquire state information of the shared vehicle, a transportation object vehicle specifying unit configured to specify a transportation object vehicle to be transported to a facility for restoring the shared vehicle so that the state information changes to a predetermined target value, on a basis of the state information of the shared vehicle and a utilization rate of the shared vehicle for rent at each station, and an operator management unit configured to generate an instruction of a task for the operator who transports the specified transportation object vehicle to the facility and manage execution of the task.

Abstract: A supercharger (15) is provided with a bypass pathway (17). A backflow preventer (20) is provided to the air intake pathway (8) between an airflow meter (10) and the bypass pathway (17). The backflow preventer (20) has: a casing (41) formed by locally expanding the cross-sectional area of the air intake pathway; and an inner tube (42) substantially constructing a duct for the mainstream of air intake. The inner tube (42) is supported by a flange portion (50) and the downstream end (42a) opens within the casing (41). During backflow when the bypass pathway (17) opens, a portion of the intake air enters into an exit-side space section (55), and the flow is prevented by the flange portion (50). Consequently, reverse flow is suppressed.

Abstract: A vehicle acceleration suppression device and a vehicle acceleration suppression method are provided to be capable of suppressing a degradation in a drive performance and suppressing acceleration at the time of an incorrect manipulation of an accelerator, at the time of parking. Based on a parking frame certainty degree indicative of a degree of certainty that there is a parking frame in a vehicle travel direction and a parking frame entering certainty degree indicative of a degree of certainty that the vehicle enters the parking frame, a total certainty degree indicative of a total degree of certainty of the parking frame certainty degree and the parking frame entering certainty degree is set. As the total certainty degree is higher, a suppression degree of the vehicle acceleration to be controlled in response to a manipulation amount of an accelerator pedal manipulated by a driver to instruct a drive force is increased.

Abstract: A steering control device increases a steering reaction force of a steering reaction force actuator in a direction in which a lateral position of a host vehicle moves away from a travel path partition line when a turning amount of a turning actuator increases in the direction in which the lateral position of the host vehicle moves away from the travel path partition line. A steering reaction force control amount is computed for a reaction force suppression processing to reduce the steering reaction force control amount when the steering reaction force control amount has been at a threshold value or higher for a length of time. The reaction force suppression processing is carried out to control the steering reaction force actuator in lieu of the steering reaction force control amount. Meanwhile, the turning amount is maintained at a value occurring when the reaction force suppression processing began.

Abstract: A driving control system has a position/speed information detecting section for detecting the position and speed of a host vehicle, a communication unit for acquiring the position and speed information of another vehicle, a proximity position estimating section that estimates a proximity position at which the host vehicle and the other vehicle approach each other and a proximity position changing unit that, when the host vehicle and the other vehicle are travelling on the same lane at the same time, changes the proximity position to a changed proximity position outside of a waiting time generation area. A travelling plan generation section generates a travelling plan while the other one of the host-vehicle and the other vehicle enters the waiting time generation area. A communication unit transmits the travelling plan to the other vehicle, and a travel driving unit executes the driving of the host vehicle according to the travelling plan.

Abstract: A resonator (12) for reducing intake air noise is connected to an intake air duct (6) connecting a throttle chamber (5) and an air cleaner case (7). This blow-by gas treatment device is equipped with a fresh air introduction passage comprising a fresh air introduction hose (16), and a blow-by gas passage comprising a blow-by gas hose (20), with the fresh air introduction hose (16) connecting a cylinder head cover (4) and the resonator (12). A connector part (15) of the resonator (12) to which the fresh air introduction hose (16) is connected is provided with an orifice (21) formed integral with a lower body (13) formed of a synthetic resin, as a part thereof. Pulsation is effectively reduced by the throttling effect of the orifice (21) and the expansion effect of the resonator (12).

Abstract: [Object] Provided is a means for improving cycle characteristics by suppressing electrode deterioration resulting from non-uniformity of voltage across an electrode plane in a high-capacity and large-area non-aqueous electrolyte secondary battery that includes lithium nickel-based composite oxide as a positive electrode active substance.

Abstract: An air battery includes a cathode layer and an anode layer sandwiching an electrolyte layer, and an electrically insulative outer case. The cathode layer has a cathode member, a cathode current collector and a liquid tight/gas permeable member. The cathode layer is provided with a contact member between the outer case and the cathode layer, in which the inner end thereof is in contact with the periphery of the cathode current collector, and the outer end thereof is exposed on a cathode-side surface. The outer end of the contact member protrudes outward with respect to a surface of the liquid tight/gas permeable member to an extent reaching at least a plane including an end face of the outer case. Therefore, this air battery can be directly connected to another battery in series, and is suitable for an on-vehicle power source.

Abstract: Provided is a battery temperature control device configured to automatically heat a battery with a battery-driven heater so that the battery does not freeze at a minimum electric power consumption when the battery is out of use. The battery temperature control device predicts, based on a combination of a battery temperature and an outside air temperature, a predictive time that the battery temperature is likely to be less than a first set temperature, while the battery temperature is higher than or equal to the first set temperature at which there is no risk of freezing, and sets the predictive time as the next controller startup time, and determines whether or not the battery temperature has fallen to below the first set temperature with a control program wakeup when the predictive time has expired, and battery-drives the heater when the battery temperature fall has occurred, to heat the battery.

Abstract: A hybrid vehicle has an internal combustion engine and a motor as a driving source, a transmission that changes a speed of rotation of the internal combustion engine or motor and transmits the rotation to driving wheels of the vehicle, a high-voltage battery that supplies power to the motor through an inverter, a cooling mechanism equipped with a pump to circulate a coolant and thereby cool the inverter, a coolant temperature measurement device that detects or estimates a temperature of the coolant, a low-voltage battery that supplies power to the pump, and a converter through which power is supplied from the high-voltage battery to the pump.

Abstract: An EGR control device includes an estimate EGR ratio calculating portion adapted to calculate an estimate EGR ratio from a fresh air flow amount at a joining portion with the EGR passage of an intake passage and an EGR gas amount passing through the EGR valve, and a joining portion EGR ratio estimating portion adapted to correct an estimate EGR ratio on the basis of a gaseous state inside the introduction passage when the EGR valve switches from a closed state to an open state, to calculate a joining portion EGR ratio being a proportion of an EGR gas amount with respect to fresh air in the joining portion.

Abstract: A seat back panel for a vehicle has a plate-shaped main body disposed between a vehicle compartment and a trunk, and having a first plate member disposed on a vehicle compartment side of the vehicle, and a second plate member disposed on a trunk side while facing the first plate member and a fiber assembly having a plurality of fibers housed between the first plate member and the second plate member. An opening portion which establishes communication between the vehicle compartment and the trunk is formed in the plate-shaped main body. The fiber assembly is disposed along a peripheral edge portion of the opening portion. A space is provided between the first plate member and the second plate member. An intermediate member is interposed in the space.

Abstract: A rotor structure for an electric rotating machine has a rotor, a plurality of strip-shaped permanent magnets which are arranged in a circumferential direction of the rotor, each of which penetrates the rotor in an axial direction of the rotor, flux barriers which are air gaps provided at positions corresponding to width-direction end portions of the permanent magnets to face the width-direction end portions of the permanent magnets, and demagnetization prevention holes, each of which is provided at a position in a vicinity of a corresponding one of the flux barriers and on an opposite side of the flux barrier from a stator and configured to reduce demagnetization at a corresponding one of the width-direction end portions of the permanent magnets.

Abstract: A vehicle storage compartment assembly has a bottom wall, a first and second upright walls and a top wall. The first upright wall, the second upright wall and the top wall are each formed with a breakaway structure. A first section is defined on a first side and a second section is defined on a second side of the breakaway structure. The bottom wall extends from the first section to the second section in the absence of the breakaway structure. The first section, the second section and the bottom wall define a storage space. The breakaway structure is configured such that in response to one of the first section and the second section receiving an impacting force the breakaway structure breaks separating the first section from the second section along the first upright wall, the second upright wall and the top wall.

Abstract: A control unit stores a correlation between a temperature difference ?T between an inlet temperature and an outlet temperature of a heat exchanger for cooling of cooling water, and the amount of thermal deformation occurring in the heat exchanger. At the time when the cooling water is supplied to the heat-exchanging flow path having the heat exchanger, the control unit refers to the temperature difference ?T and the correlation to obtain the volume of flow of the cooling water supplied to the heat-exchanging flow path so that the amount of thermal deformation is less than or equal to a threshold amount of thermal deformation set in advance.

Abstract: A method for providing information to a driver of a vehicle includes receiving remote vehicle information indicating geospatial state and kinematic state for each of the one or more remote vehicles. The method also includes identifying host vehicle information indicating geospatial state and kinematic state for the host vehicle, identifying a queue length representing a number of vehicles queued ahead of the host vehicle, and identifying at least one of the one or more remote vehicles as a conflicting vehicle. The method also includes determining a time-to-contact based on the remote vehicle information corresponding to the conflicting vehicle and the host vehicle information. The method also includes causing a warning alert to be output if the time-to-contact is less than a warning alert threshold and only if the queue length is zero vehicles.