Method and system for speed guide at intersection with traffic signal lights

Abstract

The invention provides a method and a system for speed guide at an intersection with traffic signal lights. The method comprises the following steps: when detecting traffic signal light information of an intersection in front, acquiring the distance between the current position and the stop line of the intersection in front; calculating the arrival time needed to arrive at the stop line according to the current speed and the distance; judging the current traffic signal state, including passing and no passing; if passing is allowed, judging whether the remaining time is greater than the arrival time; if the remaining time is greater than the arrival time, prompting the driver to keep driving at the current speed; if the remaining time is not greater than the arrival time, calculating the acceleration time needed to arrive at the stop line, and judging whether the acceleration time is greater than the remaining time; if the acceleration time is greater than the remaining time, prompting the driver that there is no need to accelerate; if the acceleration time is not greater than the remaining time, prompting the driver to accelerate; if passing is prohibited, judging whether the remaining time is greater than the arrival time; if the remaining time is greater than the arrival time, prompting the driver that there is no need to accelerate; and if the remaining time is not greater than the arrival time, prompting the driver to keep driving at the current speed. The method and the system help vehicles to pass an intersection at proper speed, save time for users, and guarantee the safety of traffic.

Description

technical field [0001] The invention relates to the technical field of traffic navigation, in particular to a vehicle speed guidance method and system for passing traffic signal light intersections. Background technique [0002] At present, drivers can only judge whether they can pass through the traffic lights at intersections by virtue of the road conditions at that time and past experience. Most prudent drivers will choose to slow down at a certain distance from the crossing, so as to respond according to the traffic light signal at that time. However, this approach will lead to traffic jams to a certain extent. Some drivers who are in a hurry or like to take risks will increase the accelerator and run through the signal lights at the intersection. However, this approach is extremely likely to cause traffic accidents. [0003] Existing navigation technology can provide the driving path for the driver and inform the driver how far ahead there is an intersection, but canno...

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a vehicle speed guidance method and system for passing through traffic signal intersections, which is used to solve the problem in the prior art that it is impossible to judge whether it is possible to pass through the intersection ahead

Images