Highway maintenance, like rehabilitation or resurfacing, on four-lane, two-way highways usually requires closing one or two lanes to set up a work zone. In this paper we evaluate several alternatives … [Read more...] about Work Zone Lengths for a Four-Lane Road with an Alternate Route
Detours
Iowa DOT Standard Road Plans
The standard road plans contained in this manual (commonly referred to as the "Red Book") have been developed to show standardized design features, construction methods and approved materials to be … [Read more...] about Iowa DOT Standard Road Plans
2021 Standard Drawings
Standard Drawings are a complete set of drawings, available for both English and Metric versions. Section 600 is for Incidental Construction and Section 800 is for Traffic Control Devices & … [Read more...] about 2021 Standard Drawings