Ada County Highway District

Traffic Standards / Specifications Requirements for ACHD Roadways

Traffic Specifications ACHD approved sections of the Idaho Standards for Public Works Construction (ISPWC)


For additonal information:


ACHD Main Line: 208-387-6100
Traffic Engineering:  208-387-6140
Or contact us at: Tell Us

Photograph of Hill Rd, 36th, Catalpa dogbone

We Drive Quality Transportation For All Ada County ~
Anytime...Anywhere

Ada County Highway District © 2017
For Questions or problems with this Web site contact the Webmaster