CONFIGURABLE VEHICULAR TIME TO STOP WARNING SYSTEM

• US 20100106413A1
• Filed: 10/24/2008
• Published: 04/29/2010
• Est. Priority Date: 10/24/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Mudalige, Upali Priyantha
• Granted Patent: US 8,103,449 B2
• Time in Patent Office: Days
• US Class Current: 701/213
• CPC Class Codes: B60W 2050/143 Alarm means
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 40/02 related to ambient conditions
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention

Abstract

A method is provided for determining when to issue an alert warning to a driver of a vehicle relating to an upcoming stopping location in a road of travel. Wireless messages transmitted from a remote entity to the vehicle are received. The messages contain information such as position data and other data affecting stopping of the vehicle. GPS data relating to instantaneous vehicle position in the road of travel is retrieved. A travel time until the vehicle reaches the stopping location is determined. A determination is made whether the driver has initiated braking. An advance notice period is determined for issuing a warning to the driver to decelerate the vehicle comprising the travel time plus a predetermined reaction time plus a selectable driver configured increment. A sensory warning to the driver of the vehicle is actuated if the advance notice period is less than the travel time and the driver has not initiated braking.

Claims

1. A method for determining when to issue an alert warning to a driver of a vehicle relating to an upcoming stopping location in a road of travel, the method comprising the steps of:

receiving a wireless message transmitted from a remote entity to the vehicle, the message containing position data relating to the stopping location in the traveled road;

retrieving GPS data relating to instantaneous vehicle position in the road of travel;

determining an instantaneous vehicle speed;

determining a travel time until the vehicle reaches the stopping location;

detecting whether the driver has initiated braking;

determining an advance notice period for issuing a warning to the driver to decelerate the vehicle comprising the travel time plus a predetermined reaction time plus a selectable driver configured increment; and

actuating a sensory warning to the driver of the vehicle if the advance notice period is less than the travel time and the driver has not initiated braking.

2. The method of claim 1 wherein the advance notice period further comprises increments corresponding to environmental conditions and driving behavior.

3. The method of claim 1 wherein the message transmitted by the remote entity is transmitted as an infrastructure-to-vehicle communication.

4. The method of claim 1 wherein the message transmitted by the remote entity is transmitted as a vehicle-to-vehicle communication.

5. The method of claim 1 wherein the message contains data relating to a stop sign lane marking,

6. The method of claim 1 wherein the message contains data relating to a traffic light lane marking.

7. The method of claim 6 wherein the message further contains data relating to the time the traffic light turns red.

8. The method of claim 1 wherein the message contains data relating to a rail crossing sign marking.

9. The method of claim 1 wherein the message contains data relating to a rail crossing sign marking.

10. The method of claim 1 wherein the selectable driver configured increment includes a plurality of settings, each of the settings increase the advance warning period to the driver.

11. The method of claim 8 wherein the plurality of settings includes an auto default setting which utilizes environmental and driving behavior factors for determining an increment added to the advance notice period.

12. The method of claim 8 wherein the selectable driver configured increment is set to the auto default setting in the absence of a driver selection.

13. The method of claim 9 wherein the advance notice period is represented by the formula:

14. The method of claim 11 wherein the selectable driver configured increment added to the lead time t_warn—

_window is determined by the following formula;

t<sub>warn—

window</sub>=r*T

where r is a driver number of the driver selectable setting, and T is a predetermined time constant.

15. The method of claim 12 wherein the increment based on environmental and driving behavior factors added to the lead time t_warn—

_window when the auto default setting is enabled is determined by the following formula;

t<sub>warn—

window</sub>=r_auto+(K_rain+K_ice+K_light+K_road−

K_war*N_war)*T

where r_auto is a default driver selectable setting, and K_rain is a weight factor for rain, K_ice is a weight factor for ice, K_light is a weight factor for ambient lighting conditions, K_road is a weight factor for road grade conditions, K_war is a weight factor for driving behavior, N_war is a number of warnings-brake events within a past time window, T is a predetermined time constant.

16. The method of claim 1 wherein the advance notice period is based on stopping the vehicle at a stop light signal lane marking.

17. The method of claim 1 wherein the advance notice period is based on stopping the vehicle at a stop signal marking.

18. The method of claim 1 wherein the advance notice period is based on stopping the vehicle at a stopped vehicle forward of the vehicle.

21. The vehicular warning system of claim 17 wherein the controller for determining a travel time is integrated as part of an automated cruise control configuration unit.

22. The vehicle warning system of claim 17 wherein the remote entity transmitter includes a vehicle-based transmitter.

23. The vehicle warning system of claim 17 wherein the remote entity transmitter includes a road side equipment infrastructure-based transmitter.

19. A vehicular warning system for alerting a driver of a vehicle of an upcoming stopping location in a road of travel, the system comprising:

a host vehicle receiver for receiving a remote wireless message from a remote entity transmitting unit for transmitting the wireless message, the wireless message including position data relating to a stopping location in the traveled road of the driven vehicle;

a GPS receiver for determining an instantaneous vehicle position in the traveled road;

a controller for determining a travel time to reach the stopping location in response to the remote wireless message data and the in-vehicle GPS, the controller determining an advance notice period for issuing a warning to the driver to initiate deceleration of the vehicle in response to travel time plus a predetermined reaction time plus a selectable driver configured increment; and

a driver vehicle interface for actuating a sensory warning to the driver of the vehicle if the advance notice period is less than the travel time and the driver has not initiated braking.

20. The vehicle warning system of claim 19 wherein the wireless message further includes data relating to lane and intersection geometry data, weather information, road grade and road condition data, work zone information, traffic data, or accident risk information.