Traffic flow risk prediction and mitigation
AssigneeGM Global Technology Operations LLC
InventorsRichard Gordon, Donald K Grimm
Life of this patent
Estimating the term…
Abstract
A method for determining a risk boundary in response to the plurality of indications of hard braking events wherein the risk boundary is indicative of a plurality of speed flow pairs at which a risk of a hard braking event is below a threshold value, determining, at a road segment level, a set of speed flow pairs of average speed and vehicle count and a plurality of indications of hard braking events, determining a host vehicle speed, and performing at least one of reducing the host vehicle speed and increasing a host vehicle following distance in response to the host vehicle speed exceeding the risk boundary for the vehicle flow density.
Claims20
An apparatus comprising:
- a user interface configured to receive a driver risk tolerance in response to a user input, wherein the driver risk tolerance is user defined via the user input in a driver information center;
- a receiver configured to receive a data indicative of a plurality of hard braking events wherein each of the plurality of hard braking events is associated with one of a plurality of vehicle speed flow pairs;
- a processor for determining a risk assessment in response to a host vehicle speed, a host vehicle following distance, and the plurality of hard braking events, wherein the risk assessment is determined in response to a speed flow boundary and wherein the speed flow boundary excludes a first portion of the plurality of speed flow pairs having a number of hard braking events above a threshold number and includes a second portion of the plurality of speed flow pairs having a number of hard braking events below a threshold number;
- a user interface for displaying at least one of a reduced vehicle speed and an increased following distance in response to the risk assessment exceeding the driver risk tolerance;
- and
- a vehicle controller configured to reduce a vehicle speed to a reduced vehicle speed in response to the risk assessment exceeding the driver risk tolerance.
A method performed by an advanced driver-assistance system comprising:
- receiving, via a user interface, a driver risk tolerance in response to a user input, wherein the driver risk tolerance is user defined via the user input in a driver information center;
- receiving, by a receiver, a data indicative of a plurality of hard braking events wherein each of the plurality of hard braking events is associated with one of a plurality of vehicle speed flow pairs;
- determining, by a processor, a risk assessment for a roadway segment wherein the risk assessment is generated in response to a host vehicle speed, a host vehicle following distance a vehicle flow rate on the roadway segment, an average vehicle speed on the roadway segment and the plurality of hard braking events wherein the risk assessment is determined in response to a speed flow boundary and wherein the speed flow boundary excludes a first portion of the plurality of speed flow pairs having a number of hard braking events above a threshold number and includes a second portion of the plurality of speed flow pairs having a number of hard braking events below a threshold number;
- and
- reducing a vehicle speed in response to the risk assessment exceeding the driver risk tolerance.
A method comprising:
- receiving, via a user interface, a driver risk tolerance in response to a user input, wherein the driver risk tolerance is user defined via the user input in a driver information center;
- receiving a data indicative of a plurality of hard braking events wherein each of the plurality of hard braking events is associated with a vehicle speed flow pair;
- determining a risk boundary in response to the plurality of hard braking events wherein the risk boundary is indicative of a plurality of speed flow pairs at which a risk of a hard braking event is below a threshold value;
- determining a vehicle flow density for a roadway segment;
- determining a host vehicle speed;
- and
- performing at least one of reducing the host vehicle speed and increasing a host vehicle following distance in response to the host vehicle speed exceeding the risk boundary for the vehicle flow density.
Dependencies are inferred from the claim text.