Every day, IDOT strives to provide safe, cost-effective transportation for Illinois in ways that enhance quality of life, promote economic prosperity, and demonstrate respect for our …

On rural facilities where crest vertical curves and horizontal curves occur at the same location, use the K-values in Figure 30-2A to ensure that the horizontal curve is visible as drivers …

The Traffic maps listed below display the annual average daily traffic (AADT) on the State Primary system. The Primary system contains the roads that are marked as an Interstate, United …

The objective of this study is to assess the ability of the methods currently used by IDOT, to assess other methods for estimating pile capacity, to improve the methods if possible, and to …

Our mission is to provide safe, cost-effective transportation for Illinois’ residents and visitors in ways that enhance quality of life, promote economic prosperity and demonstrate respect for …

This invitation is the official advertisement and solicitation for Request for Information (RFI), Request of Qualifications (RFQ) and Request for Proposals (RFP) issued by the Illinois …

onic (pdf) version of the Standard Drawings are now made searchable (text). D2 Symbol sed to match IDOT and Section K revision. All Title changed to match

Discover, analyze and download data from Illinois Department of Transportation. Download in CSV, KML, Zip, GeoJSON, GeoTIFF or PNG. Find API links for GeoServices, WMS, and …

This manual consolidates and supersedes all previous versions of the: IDOT CADD Roadway and Structures Deliverables Policy, IDOT CADD Roadway Drafting Reference Guide, and IDOT …

Our goal is to offer bridge inspection and inventory information to the public. You can locate bridges by County, Interstates, U.S. Highways, IL Highways, address, and structure number. …