Standard Road Plans
Updated for the October 2022 letting. For files prior to this letting, refer to the Electronic Reference Library (ERL)
Standard road plans show standardized design features, construction methods, and approved materials to be used in design plans for interstate, primary, and secondary road construction in the State of Iowa. Standard road plans may be modified for design situations requiring unique solutions. Section 1E-5 of the Design Manual provides guidance for modifying Standard Road Plans.