Showing papers on "Rear-end collision published in 1992"

Warning signal design : a key human factors issue in an in-vehicle front- to-rear-end collision warning system

Abstract: Warning signal effectiveness issues associated with the design of a front-to-rear-end collision warning system are discussed. Potential negative effects are that warnings may occur rarely, startlin...

Apparatus and method of warning rear-end collision

Abstract: A warning apparatus for warning of possible rear-end collision of a given vehicle having the warning apparatus with another vehicle preceding the given vehicle includes: a computer; a distance sensor for measuring a vehicle-to-vehicle distance to the another preceding vehicle; and a velocity sensor for measuring the velocity of the given vehicle. The computer computes a relative velocity of the given and the another preceding vehicle from a differential of the vehicle-to-vehicle distance and then computes an anticipated rear-end collision time by dividing of the vehicle-to-vehicle distance by the relative velocity of the given vehicle. The computer corrects the anticipated rear-end collision time in response to an acceleration and the relative velocity. The computer produces a warning of signal and an alarm is provided in response to the corrected anticipated rear-end collision time. A method of warning of a possible rear-end collision comprises the step of: detecting a vehicle-to-vehicle distance between a given vehicle and the another vehicle preceding the given vehicle; detecting a velocity of the given vehicle; computing an anticipated rear-end collision time Ta of the given vehicle with the another vehicle, with an equation: ##EQU1## and producing a warning in response to the computed anticipated rear-end collision time Ta.

The Potential Value of a Front-to-Rear-End Collision Warning System Based on Factors of Driver Behavior, Visual Perception and Brake Reaction Time

Abstract: The potential value of a front-to-rear-end collision warning system based on factors of driver behavior, visual perception and brake reaction time is examined in this paperTwenty-four percent of all motor vehicle crashes involving two or more vehicles are front-to-rear-end collisions These collisions demonstrate that several driver performance factors are common The literature indicates that drivers use the relative size and the visual angle of the vehicle ahead when making judgments regarding depth In addition, drivers often have difficulty gauging velocity differences and depth cues between themselves and the vehicle they are following Finally, drivers often follow at distances that are closer than brake-reaction time permits for accident avoidance It is apparent that the comfort level of close following behavior increases over time due to the rarity of consequences Experience also teaches drivers that the vehicle in front does not suddenly slow down very oftenOn the basis of these driver behavi

Device for preventing vehicle from rear-end collision

Abstract: PURPOSE:To prevent a rear-end collision caused by erroneously pedalling an accelerator pedal and brake pedal. CONSTITUTION:A control means is characteristically provided which detects a distance between one's vehicle and anothere vehicle in front and a pedalling force of an acelerator pedal and controllably reduce the vehicle speed of one's vehicle when the distance between both vehicles is shorter than a safety distance and the pedalling dorce of the accelerator pedal exceeds a predetermined value.