摘要: |
The purpose of this study was to examine these and other NHS safety issues of interest using the Federal Highway Administration's Highway Safety Information System (HSIS). The HSIS database contains information on accident, traffic, and roadway characteristics in California, Illinois, Maine, Michigan, Minnesota, North Carolina, Utah, and Washington State. This analysis used data from each HSIS State except Utah. It should be noted that this analysis only includes routes on State roadway systems. |