| Title | The Development of Crash Modification Factors: Highway Safety Statistical Paper Synthesis |
|---|---|
| Record ID | 79584 |
| Personal Name Creator |
Donnell, Eric T.; Hanks, Ephraim; Porter, Richard J.; Cook, Lawrence; Srinivasan, Raghavan; Li, Fan; Nguyen, Maggie; Eccles, Kimberly A. |
| Personal Name Contributor |
Amjadi, Roya |
| Corporate Creator | United States. Federal Highway Administration. Office of Safety Research and Development |
| Corporate Contributor |
VHB/Vanasse Hangen Brustlin, Inc. |
| Publisher | United States. Federal Highway Administration. Office of Safety Research and Development |
| Publication Date | 20201101 |
| Language | English |
| Abstract | The transportation-engineering community is transforming by integrating quantitative methods into the task development process. This report identifies opportunities to better understand the relationships between road safety and factors that affect traffic-crash occurrence and severity. In this report, current statistical-analysis methods and data sources used in road-safety research are compared with alternative methods and data sources. Causal inference methods are compared to observational before–after methods to develop safety-effect estimates of centerline and edgeline rumble strips. Regression trees and Random ForestsTM are compared to count regression methods to predict crash frequencies on freeways. Road-safety performance estimates using the Crash Outcomes Data Evaluation System are also discussed, with a focus on opportunities to link hospital and crash data to understand the relationship between crashes and site-specific contributing factors. Methods to account for underreporting in crash-frequency models are also described. |
| Rosap ID | dot:54591 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/54591 |
| TRT Terms | Crash modification factors; Highway safety; Statistical analysis; Regression analysis |
| General Subjects | Statistical analysis; Propensity score; Probabilistic link; Regression trees; CODES; Causal inference |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1764473 |
| Contract Number | DTFH61-13-D-00001 |
| Report Number | FHWA-HRT-20-069 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/79000/79500/79584/FHWA-HRT-20-069.pdf |
| Format | |
| Database | NTL Digital Repository |