Session: 14-04-02: Reliability and Safety in Transportation Systems II

Paper Number: 142179

142179 - A Comparative Analysis of Lane Keeping Assist and Lane Departure Warning Systems on Curved and Straight Roadways 

Comparative testing was employed to evaluate the performance of Lane Keeping Assist (LKAS) and Lane Departure Warning (LDW) systems across three different vehicles, including a 2014 Subaru Forester, 2016 Ford F-150, and the Mobileye 6 series integrated and installed into a 2013 Mitsubishi Lancer. The LDW and LKAS systems were tested on both a curved rural roadway at approximately 40 miles per hour (mph) and a straight rural roadway at approximately 55 – 60 mph in Pennsylvania. Whenever possible, the vehicle's Controller Area Network (CAN) bus data was analyzed using Vehicle Spy (VSPY) hardware and software and integrated with a VBOX 3i RTK DGPS data acquisition system that was recording the testing. A road-facing nadir GoPro Hero8 action camera was synced with the VBOX data acquisition system and was mounted above the vehicle's left front wheel to monitor testing. The video obtained from the GoPro Hero8 was compared with the data acquired from the CAN bus, instrument cluster, and/or driver interface to compare the performance of the LKAS/LDW systems on the Subaru, Ford, and Mitsubishi on both curved and straight roadways at different speeds.

 

This paper discusses testing of LDW and LKAS systems of vehicles equipped with active ADAS systems and passive ADAS systems. The 2016 Ford F-150 used for testing had both an active and passive LDW/LKAS system. The 2014 Subaru Forester had a passive warning- only LDW system, and the 2013 Mitsubishi Lancer equipped with an aftermarket Mobileye 6 series LDW system was also a passive ADAS.

 

The purpose of this research is to present and discuss the results of LDW/LKAS testing conducted on three test vehicles at speeds of approximately 40 mph on a curved roadway on a rural two-lane roadway in Pennsylvania delineated by a solid, painted, double-yellow centerline. The performance of these three systems will then be compared to testing conducted on a straight roadway delineated by a dashed centerline at test speeds of approximately 55 – 60 mph. The aim of the research is to add LDW/LKAS testing of these three systems to the database of publicly available information. A limitation of the testing is a direct comparison of the same speed, either 40 or 55 – 60 mph, between the straight and curved testing.

 

1.       The 2016 Ford F-150 AID-only system consistently correctively steered the vehicle back into the southbound lane of travel in the curved roadway tests.

 

2.       The 2016 Ford F-150 AID + Alert system triggered a lane departure warning on the vehicle's onboard display during 80 % of the tests when the left wheel was in zone 1. The other two alerts occurred when the left wheel was in zone two. Corrective steering was applied and successfully steered the vehicle back into the intended lane of travel.

 

3.       The 2016 Ford-F150 vehicle's Alert-only system displayed lane departure warnings when the vehicle was near the center of the roadway in the curved and near the center of the roadway or in the opposite lane of travel in the straight roadway tests. The haptic feedback in the form of a vibrating steering wheel shortly followed the visual alert in the instrument cluster.

 

4.       The 2014 Subaru Forester's alert-only audible/visual LDW system produced a LDW when the left front wheel was in zone 2 during all the tests of the curved roadway.

 

5.       The 2013 Mitsubishi Lancer equipped with an aftermarket Mobileye 6 series ADAS triggered the audio alarm and visual alert during all 11 tests in this test series on the curved roadway. The alert was provided when the left front wheel just crossed the threshold onto Zone 5, which delineates the opposing lane of travel, in all of the tests. This was consistent with the performance of the system in the straight roadway tests.  

Presenting Author: Shawn Harrington Forensic Rock

Presenting Author Biography: Shawn F. Harrington is an accident reconstructionist with an Honors degree in Engineering Science and Mechanics from the Pennsylvania State University. He is the principal and founder of Forensic Rock, an engineering firm specializing in research, analysis, and consulting in the fields of accident reconstruction and advanced driver assistance systems (ADAS). Mr. Harrington has over 17 years of experience in the field, has a CDL, has testified in state and federal venues throughout the country, is a Lieutenant with the Lingohocken Fire Company, and has authored peer-reviewed technical articles in journals like the SAE and Collision Magazine. Mr. Harrington has had the honor of being asked by his peers to present his research at national accident reconstruction conferences and is an instructor on ADAS and AR for the SAE. He continues to conduct research and publish in the field on topics such as forward collision warning, automatic emergency braking, and pedestrian detection by ADAS.

Authors:

Shawn Harrington Forensic Rock
Shubham Takbhate Forensic Rock