Estimating the Real-World Benefits of Lane Departure Warning and Lane Keeping Support Systems
2022-01-0980
03/29/2022
- Event
- Content
- Four crash modes are overrepresented in traffic fatalities: run-off-road crashes, non-tracking run-off-road crashes, head-on crashes, and pedestrian crashes. Two advanced driver assist systems developed to help prevent and mitigate tracking run-off-road crashes and head-on crashes are lane departure warning (LDW) and lane keeping support (LKS). LDW acts to warn the driver when they have left the lane, whereas LKS performs automatic steering to prevent the vehicle from departing the lane. The objective of this research was to estimate LDW and LKS effectiveness in reducing run-off-road crashes and cross-centerline head-on crashes. All passenger vehicles that experienced a lane departure from 2017 to 2019 in the Crash Investigation Sampling System (CISS) were analyzed. CISS records the availability of active safety features for each vehicle, including LDW and LKS. The system effectivenesses were computed using the quasi-induced exposure method, where the exposure group was vehicles that were rear-struck in rear-end crashes. Non-tracking cases and cases where the driver may have been intentionally changing lanes were excluded from the target population because LDW would not be relevant. There were an estimated 470,944 vehicle lane departure crashes. Of the vehicles involved in these events, LDW was available in 33,728 of them and LKS was available in 11,138. Our study estimated that LDW and LKS were effective in reducing the overall number of target population crashes by 3.0% ± 32% and 60% ± 16%, respectively. LKS was much more effective than LDW, which is likely due to drivers deactivating LDW, therefore limiting the system’s potential effectiveness.
- Citation
- Dean, M., and Riexinger, L., "Estimating the Real-World Benefits of Lane Departure Warning and Lane Keeping Support Systems," SAE Technical Paper 2022-01-0980, 2022, .