Lower Beam Headlighting System Performance On-Vehicle Test Procedure Examination

Voyzey, Nick; Mazzae, Elizabeth N.; Baldwin, G.H. Scott; Andrella, Adam T.

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Lower Beam Headlighting System Performance On-Vehicle Test Procedure Examination

2025-09-01
By Voyzey, Nick ; Mazzae, Elizabeth N. ; Baldwin, G.H. Scott

File Language:

English

Details

Creators:

Voyzey, Nick ; Mazzae, Elizabeth N. ; Baldwin, G.H. Scott ; Andrella, Adam T.
Corporate Creators:

United States. Department of Transportation. National Highway Traffic Safety Administration. Vehicle Research and Test Center
Subject/TRT Terms:
Publication/ Report Number:

DOT HS 813 702
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report
Corporate Publisher:

United States. Department of Transportation. National Highway Traffic Safety Administration
Abstract:

The 2021 Infrastructure Investment and Jobs Act amended FMVSS No. 108 to include performance-based standards for vehicle lower beam headlighting systems to ensure they are correctly aimed and tested on vehicles to account for lamp height and lighting performance. This report summarizes an effort to develop a test procedure that assesses performance of lower beam headlighting systems while the headlamps are installed on the vehicle. This research evaluated accuracy and repeatability of the candidate test procedure that was based on previous NHTSA work to create a test procedure for assessing lower beam headlighting system performance and work by UMTRI to assess performance-based FMVSS No. 108 test methods. Seven light motor vehicle headlighting systems were tested. The vehicle measured illuminance averaged 7 percent higher than the laboratory measured illuminance. Overall, this effort revealed the challenges of an on-vehicle measurement method compared to a lab-based method.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/86560/dot_86560_DS1.pdf
File Type:

[PDF - 2.33 MB]
Collection(s):

NHTSA - Vehicle Safety Research
Main Document Checksum:

urn:sha-512:33b8551885c154ac714769651f5a7818af63c620e402f8bf0fc224cee1cb4424ff624ba145d8a2f63e84d98b45c4360513b956db89b6590f5dd477e07902292f

File Language:

English

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