Curve rollover warning system for trucks
First Claim
1. A method for preventing vehicle rollover for a vehicle traveling on a road, said method comprising:
- for each present position of said vehicle as said vehicle travels on said road, forecasting future speed of said vehicle as a function of future position of said vehicle on said road, for a plurality of points that are distributed throughout a segment of said road forward of said vehicle, based on an assumption regarding a driving behavior of an operator of said vehicle relative to statistical speed data for vehicles traveling said road, and based on road geometry data contained in a map;
at each said present position of said vehicle, determining a maximum safe speed of said vehicle for each of said plurality of points in said road segment forward of said vehicle, based on a maximum lateral acceleration, on said road geometry and on physical parameters of said vehicle; and
generating a rollover warning for any current position of said vehicle on said road at which the forecast future speed for at least one particular point on said road segment forward of said vehicle exceeds the determined maximum safe speed at said at least one particular point.
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Abstract
In a method for preventing rollover for a vehicle traveling on a road, for each present position of the vehicle as it moves forward, its speed is forecasted for future positions of the vehicle on the road, based on an assumption regarding driving style of the operator, and based on a map containing road geometry data and statistical speed data for vehicles traveling said road. At each such present position of the vehicle, a maximum safe speed is determined for points on the road forward of the vehicle, based on a maximum lateral acceleration, the road geometry and the vehicle parameters. A rollover warning is generated for any current position of the vehicle at which the forecasted future speed for at least one particular point on the road forward of the vehicle exceeds the determined maximum safe speed at particular point.
102 Citations
16 Claims
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1. A method for preventing vehicle rollover for a vehicle traveling on a road, said method comprising:
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for each present position of said vehicle as said vehicle travels on said road, forecasting future speed of said vehicle as a function of future position of said vehicle on said road, for a plurality of points that are distributed throughout a segment of said road forward of said vehicle, based on an assumption regarding a driving behavior of an operator of said vehicle relative to statistical speed data for vehicles traveling said road, and based on road geometry data contained in a map; at each said present position of said vehicle, determining a maximum safe speed of said vehicle for each of said plurality of points in said road segment forward of said vehicle, based on a maximum lateral acceleration, on said road geometry and on physical parameters of said vehicle; and generating a rollover warning for any current position of said vehicle on said road at which the forecast future speed for at least one particular point on said road segment forward of said vehicle exceeds the determined maximum safe speed at said at least one particular point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for preventing vehicle rollover for a particular vehicle traveling on a road, said method comprising:
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compiling a map database containing road geometry data for at least a road segment of said road; operating vehicles over said road segment and receiving their speed data as a function of position along said road segment, said speed data being stored in said map database; determining a maximum safe speed for the particular vehicle for a plurality of points that are distributed along said road segment; projecting speed of the particular vehicle as a function of position within said road segment, based on an assumption regarding relative driving speed behavior of an operator of the particular vehicle compared to said statistical speed data for said road segment, as stored in said map; and generating a warning for any point in time at which the projected future speed of the particular vehicle exceeds said maximum safe speed at any point within said road segment. - View Dependent Claims (16)
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Specification