Statewide
- MDOT NFC Maps - MDOT National Functional Classification (NFC) maps by county and urban area. An effort was started in late 2013 to convert metro Detroit and other major cities to their corresponding NFC road classifications.
- Boundary and Annexation Survey Maps from US Census Bureau
- TIGERweb from US Census Bureau
- MDOT Physical Road (PR) Finder (also see the PR Finder Home page)
- MDOT MiDrive (Traffic, Construction, etc.)
- MDot Twitter feed
County
- Directory of county road commissions, many of which maintain a list of planned improvements or current projects
County GIS Maps
- Listing of all counties in Michigan and available GIS maps.