An automatic driving system includes: an information acquiring device configured to acquire driving environment information indicating a driving environment of the vehicle; a running control device configured to execute lane change control from a first lane to a second lane during automatic driving of the vehicle based on the driving environment information; and a display device configured to display an upper limit value of a running speed of the vehicle which is set by a driver of the vehicle during automatic driving. The display device is configured to display a deviation value which is calculated based on a target value of the running speed and the upper limit value along with the upper limit value during a speed-deviation running in which the running speed is higher than the upper limit value.

To reduce the effects of traffic jams, a traffic reduction system identifies road segments having more a threshold amount of traffic. The traffic reduction system also receives an indication of a current location of a client device operating in a vehicle and compares the current location to the locations of the identified road segments to determine whether the vehicle is on or approaching the road segment. If the vehicle is on or approaching the road segment, the traffic reduction system determines a target speed for the vehicle to maintain an equal distance between the vehicle and the vehicle in front of the vehicle and the vehicle and the vehicle behind the vehicle. The traffic reduction system then provides the target speed to the client device for display on a user interface. By maintaining equal distances between vehicles in front of and behind each other, the amount of traffic dissipates.

A method for determining a limit speed for driving, for a driver at a vehicle's steering wheel, includes a step of estimating a grip potential available at a given instant between a tire of the vehicle and a roadway on which a tire of the vehicle is running. The grip potential is estimated as a function of at least one of: a known influencing parameter, and a measured influencing parameter. The method also includes a step of determining a need for grip as a function of a driving situation of the vehicle and driving characteristics of the driver. The method further includes a step of determining a limit speed for driving as a function of the need for grip and the estimated grip potential. By virtue of the limit speed for driving, it is possible to prevent exceeding an estimate grip potential available.

A vehicle window plate has a maximum value of a variation of a curvature in a vertical direction being 7.6E-6 mm.sup.2 or less at least within a HUD display area. The curvature preferably increases monotonically from a lower side to an upper side at least within the HUD display area.

A method of controlling a driving speed, which controls a working vehicle at a remote location to be driven on a route at an optical driving speed, is provided. The method includes: calculating terrain data based on a terrain scan image of the route acquired by a terrain scanner of the working vehicle; calculating the optimal driving speed according to the calculated terrain data; generating a driving control signal controlling the working vehicle to be driven on the route at the calculated optimal driving speed; calculating a vibration value of the working vehicle being driven on the route at the calculated optimal driving speed based on a sensing value acquired by a sensor of the working vehicle; adjusting the calculated optimal driving speed according to the calculated vibration value; and regenerating a driving control signal controlling the working vehicle to be driven on the route at the adjusted optimal driving speed.

A method for determining a safe speed (v*) at a future waypoint (s*) of a vehicle moving along a route. In this step, at least one item of route data (in particular the curvature of the curve ) characterizing the course of the route is determined. In addition, a first probability distribution (P.sub.ges) of a coefficient of friction () is provided at the current waypoint (s) and/or at the future waypoint (s*) of the vehicle. Subsequently a second probability distribution (P.sub.v) of a vehicle speed (v) at the future waypoint (s*) is determined from the at least one item of route data () and from the first probability distribution (P.sub.ges). The safe speed (v*) is determined by statistical analysis from the second probability distribution (P.sub.v).

When an accept operation for permitting a speed limit to be set as a target speed has been detected, a driving support ECU gradually increases the current target speed toward the current speed limit. The target speed is displayed in a gradual-change display screen on a display apparatus. A driver performs a correcting operation at the time at which the driver recognizes that the displayed target speed exceeds the speed limit. The driving support ECU corrects the target speed based on the correcting operation.

A method of calculating a commonly driven velocity recommendation, comprising: gathering a plurality of data messages from a plurality of client devices located in a plurality of different vehicles, each data message comprises a current location value, a current bearing value, and a current velocity value estimated for a hosting vehicle; clustering the plurality of data messages in a plurality of clusters by matching the respective location values and bearing values; calculating a commonly driven velocity per cluster of the plurality of clusters by combining data from respective cluster members; and retrieving the commonly driven velocity in response to an indication of a current location and a current bearing thereof which matches location and bearing of members of the respective cluster.

Provided is a pedal reactive force controller including: a reaction force adding unit for adding reaction force to a pedal operated by a driver; and an information transmission unit for converting a depression amount of the pedal detected by a stroke sensor into visual information, and conveying the depression amount to the driver by displaying the visual information in an operation amount display section.

A method for determining a limit speed for driving, for a driver at a vehicle's steering wheel, includes a step of estimating a grip potential available at a given instant between a tire of the vehicle and a roadway on which a tire of the vehicle is running. The grip potential is estimated as a function of at least one of: a known influencing parameter, and a measured influencing parameter. The method also includes a step of determining a need for grip as a function of a driving situation of the vehicle and driving characteristics of the driver. The method further includes a step of determining a limit speed for driving as a function of the need for grip and the estimated grip potential. By virtue of the limit speed for driving, it is possible to prevent exceeding an estimate grip potential available.