Drivers will see delays and road closures across Colorado the week of August 19-25, as the state hosts the USA Pro Challenge, one of the biggest road bike races in the country.

Transportation officials warn that the more than a million spectators are expected to attend the event and closures to accommodate the teams could cause heavy traffic volumes on highways.

Transportation officials say that, to the extent possible, closures will be kept to a minimum and highways will be reopened as quickly as possible after teams leave an area, but drivers are still encouraged to plan their trips in advance.

Daily road closure information will be made available online at CoTrip.org or by phone by calling 511.

Drivers can also receive real-time information on highway delays and closures related to the race by signing up for email and text alerts from CDOT at Coloradodot.info.

Suggested alternate routes and answers to frequently asked questions are also available online at CoTrip.org.