- Colorado Department of Transportation - Supervises road construction, maintenance, and weather-related closures, and promotes recreation, tourism, and transportation safety.
www.dot.state.co.us
- E-470 Tollway - The toll eastern beltway of Denver; it uses the EXpressToll electronic toll collection system.
e-470.com
- The Highways of Colorado - Comprehensive information.
www.mesalek.com/colo
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