Traffic Safety Potential and Effectiveness of Lane Keeping Support
Doctoral thesis, 2020
LDW provided by the vehicle industry and detectable lane markings provided by road authorities are parts of a system showing significant traffic safety benefits. As both components are dependent on each other, this makes safety the responsibility of both road authorities and the vehicle industry. Not only do LDW and CLRS complement each other, they also complement ESC and are able to avoid critical situations. LDW and CLRS are two of the most important traffic safety features for the foreseeable future, in which the share of unintentional lane drifting crashes is expected to increase. ELK will in the near future be mandatory for new cars, hereby detectable lanes and lateral vehicle position awareness will be even more important. Future research should focus on increasing the synergy between car and infrastructure interventions, holistically and systematically utilising the integrated safety chain.
Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Engineering and Autonomous Systems
The safety potential of lane departure warning systems - A descriptive real-world study of fatal lane departure passenger car crashes in Sweden
Traffic Injury Prevention,; Vol. 18(2017)p. S18-S23
The effectiveness of lane departure warning systems—A reduction in real-world passenger car injury crashes
Traffic Injury Prevention,; Vol. 18(2017)p. 225-229
The effectiveness of centerline rumble strips (CLRS) on two-lane carriageways in Sweden on injury accident risk for cars equipped with electronic stability control (ESC) and cars without ESC
Traffic Injury Prevention,; Vol. 20(2019)p. 880-885
The safety potential of enhanced lateral vehicle positioning
Traffic Injury Prevention,; Vol. 22(2021)p. 139-146
This thesis also shows that rumble strips positioned in the centre of the road represent a traffic safety measure effectively supporting the driver in avoiding unintentional lane drifting. The analysis indicates that Electronic Stability Control systems can enhance the effectiveness of centreline rumble strips. This synergetic effect can arise when the driver is in a position to react to the warning received from the centreline rumble strips and safely revert back to the lane without loosing control of the car. This thesis shows that implementing centreline rumble strips is an effective measure for reducing the amount of injury crashes on roads without median barrier since replacing the car fleet with newer cars equipped with Lane Departure Warning is time consuming.
The common denominator for Lane Departure Warning systems and centreline rumble strips is to support keeping the car’s lateral position. This thesis shows that robust lateral vehicle positioning with enhanced precision is of significant value for future in-vehicle safety systems relying on automatic steering in critical situations, such as Emergency Lane Keeping and Autonomous Emergency Steering in order to avoid crashes and consequently save lives.
Areas of Advance
Transport Systems and Logistics
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4796
Opponent: Prof. Dipl.-Ing. Klaus Kompass, BMW Group, Germany