These guide specifications provide guidance for developing transportation contract specifications and are the national standard for best practices in highway and road construction. This consensus-based guide ..... Read More
This 2020 3rd edition includes the following revisions and updates from the previous 2015 2nd edition: new fracture mechanics-based model for reflective cracking in AC overlays over flexible, ..... Read More
The AASHTO Materials Standards contain specifications, test methods, and provisional standards commonly used in the construction of highway facilities.
The Materials Standards are updated three times ..... Read More
Since its inception as a not-for-profit association in 1934, the International Right of Way Association (IRWA) has united the efforts of its members toward professional development, strong ethics and improved service to employers and the public, along with advancements within the right of way profession. IRWA is the unsurpassed source of right of way educational programs and professional services worldwide.
Dedicated exclusively to the right of way profession, IRWA has nearly 10,000 members throughout the U.S. and Canada. Our members are multi-disciplined professionals employed by private industry and government agencies as: