01559008

Component

https://doi.org/10.3141/2515-15

The Oregon Department of Transportation developed segment arterial safety performance functions (SPFs) to help quantify the safety performance of driveways located on state urban and rural arterial highways. The research team determined that the crash reporting indicating that a driveway may have been involved in the crash was not a dependable variable, so the team developed SPFs for all non-intersection-related arterial crashes (many were likely the result of vehicle interactions at driveway locations). The information included in this paper reviews the subsequent validation effort and highlights innovative techniques used for the analysis. A common validation approach is assessing model performance for spatial transferability. For this effort, however, the authors evaluated spatial transferability, spatial–temporal transferability, and individual coefficient stability and significance. These procedures were highlighted and applied to an example urban model. The model performed well with the spatial transferability resulting in statistically equivalent values. The spatial–temporal transferability provided similar values but was not statistically equivalent at the 95% level, and all but one of the model variables were determined to be statistically significant.

01587392

15-5873

English

0000-0002-8431-9304

pp 115–123

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369305

Print

Figures (7) ; References (2) ; Tables (7)

Arterial highways; Crash characteristics; Driveways; Highway safety; Mathematical models; Urban areas; Validation

Safety performance functions

Oregon

Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure

PRP, TRIS, TRB, ATRI

Dec 30 2014 1:58PM

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