Drivers on sections of Interstate 25 and Interstate 70 will see new toll prices starting Monday as transportation officials roll out “dynamic tolling” based on traffic conditions. The new pricing structure applies to the 18-mile stretch of I-25 express lanes between Monument and Castle Rock and the 12-mile stretch of westbound I-70 express lanes between the Veterans Memorial Tunnel in Idaho Springs and Empire. Drivers can expect to see similar toll prices as before, Colorado Department of Transportation officials said in a news release, ranging from $1.50 to $4.75 for I-25 and up to $9 for I-70. Toll rates may change every few minutes, and CDOT officials say the new structure will help maintain minimum speeds and keep traffic flowing. Related Articles Transportation | Extreme drought in Colorado could come every 6 years — instead of every 1,000 — due to climate change, study finds Transportation | Colorado weather: Icy roads, light snow along I-70 corridor; cold, windy conditions in Denver Transportation | Judge dismisses fatal I-70 crash case over Jeffco DA’s discovery violations Transportation | Colorado road conditions: Denver area reopens, while plains highways remain closed Transportation | Colorado’s first major winter storm of the season drops nearly 3 feet of snow, closes most major highways Get more Colorado news by signing up for our Mile High Roundup email newsletter.