Drivers using Express Lanes to quickly navigate the interstates through Colorado’s Rocky Mountains can expect to pay more or less depending on traffic, under a new “dynamic tolling” system coming later this fall. Colorado’s Department of Transportation said in a news release that the new tolls will be similar to current rates based on the time of day, ranging from $1.50 to $4.75 on the South Gap segment of Interstate 25 between Monument and Castle Rock and up to $9 on the Mountain Express Lane segment of westbound Interstate 70 between the Veterans Memorial Tunnels and Empire. However, starting later this fall, the tolls will be adjusted for traffic volume rather than fluctuating predictably, with higher tolls designed to minimize traffic in the Express Lanes during peak hours. Related Articles Transportation | Pedestrian crashes on Colorado highways, interstates increasing, state patrol says Transportation | Southbound I-25 reopens in Colorado Springs after crash Transportation | Passenger killed in crash near Denver’s Vanderbilt Park early Saturday morning Transportation | Denver man gets 10 years of prison time for road rage assault Transportation | 2 arrested for attempted murder in shooting that caused hours-long I-25 closure The agency said in its release that toll rates could be updated as often as every five to 15 minutes, with overhead signs indicating current toll prices for drivers with ExpressToll passes.