Vehicle Reverse Run Detection Using Map Matching
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Solution Overview
Problem
Existing driving support systems for vehicles traveling reversely on expressways are costly and inefficient, as they require extensive infrastructure and new map data to accurately alert drivers of reverse travel on entrance and exit ramps in parking places, leading to potential traffic accidents and unnecessary alerts.
Innovation Solution
A driving support device that uses conventional map data to detect the vehicle's position and traveling direction, estimating the current segment of the parking place road and searching for the main road within a predetermined distance to determine if the vehicle is traveling reversely on an entrance or exit ramp, thereby alerting the driver only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If on-road wireless elements are installed on entrance ramps and exit ramps to detect reverse travel, then reverse run detection accuracy is improved, but infrastructure cost and system complexity increase significantly
Solution Approach 1:
The system uses the vehicle's own navigation device to perform reverse run detection by utilizing existing map data and the vehicle's position and travel direction information, eliminating the need for external wireless infrastructure. The navigation device itself serves the dual purpose of navigation and reverse run detection.
Solution Approach 2:
Instead of installing physical wireless beacons on roads, the system creates a virtual model of the road network using existing map data, which includes information about entrance ramps and exit ramps. This digital copy allows for reverse run detection without physical infrastructure.
2Measurement precision
If new map data with detailed road classification is created to distinguish entrance ramps from parking area roads, then reverse run alert accuracy is improved, but data creation cost and time increase
Solution Approach 1:
The system makes existing map data multi-functional by utilizing it for both navigation purposes and reverse run detection. The map data's road information is repurposed to identify entrance ramps and exit ramps, eliminating the need for separate specialized data.
Solution Approach 2:
The existing map data structure is leveraged to serve the additional function of reverse run detection by utilizing road classification information already present in standard navigation maps, avoiding the need for new data creation.
3Measurement precision
If reverse run detection is applied to all parking place roads including parking area roads, then detection coverage is improved, but false alert rate increases due to legitimate reverse parking maneuvers
Solution Approach 1:
The system applies reverse run detection selectively only to specific road types (entrance ramps and exit ramps) rather than uniformly to all parking place roads. This localized application prevents false alerts during legitimate reverse parking maneuvers in parking areas while maintaining detection coverage where reverse travel is dangerous.
Data Source
AI summary
A driving support device includes: a position detector; a traveling direction detector; a map data memory; a map matching element for matching a current position of a vehicle on a road of map data; a traveling segment estimation element for estimating a current segment of the vehicle in the parking place road when a matched road is the parking place road; a main road search element for determining whether a segment of a main road of an express way is disposed in a predetermined search distance from an estimated current segment; and a reverse run determination element for determining whether the vehicle travels reversely when the main road search element determines that the segment of the main road is disposed in the predetermined search distance from the estimated current segment.