Do you enjoy using I-4 Express lanes to get where you’re going in Central Florida? Starting Monday, you could pay higher tolls when using them to travel through the region — but the cost will depend on when you go.

The Florida Department of Transportation said in a news release it will begin dynamic tolling on the 21 miles of express lanes along Interstate 4 through Orange and Seminole counties.

The concept is pretty basic: More traffic means higher tolls, less traffic means lower tolls.

FDOT said drivers should expect to pay the highest rates during the peak commuting hours of 6-9 a.m. and 3-7 p.m. weekdays through downtown Orlando. However, prices on express lanes will fluctuate throughout the day based on traffic conditions. The cost will also vary, as it does now, depending on how far you’re going.

Electronic signs overhead will show destinations and current toll rates to reach them, the agency said. Drivers will never be charged more than the toll shown on the sign when passed. If the toll changes after they pass the sign, drivers will pay the lower amount.

FDOT said the lanes were always envisioned to have dynamic tolling — bringing an end to fixed rates that have existed for the last three years. The agency said the purpose is to prevent congestion and maintain reliable travel times with a goal to keep “cars moving at least 50 mph.”

The agency said the nearly 50 million drivers who’ve been recorded using the lanes since they opened to traffic in February 2022 should see this as an improvement.

According to FDOT, tolls are not expected to rise significantly, although representatives did not respond to requests for comment about dynamic pricing.

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The agency said the use of express lanes has increased safety on the interstate.

Vehicle crashes have decreased 42% since the lanes opened, according to FDOT data, and travel speed in the general-use lanes has increased by 5 mph on average in the morning and by 8 mph in the afternoon. In addition, lane-blocking incidents have decreased by 58% over the time express lanes have been in use.

Its data shows even drivers in the general-use lane save time — roughly 4 minutes or more since the introduction of express lanes.

And Orlando won’t be the only area in the state with express lanes and dynamic tolling.

Interstate 95 in South Florida uses it with rates as low as 50 cents but typically ranging from $1.50 to $3.50, according to the Miami Herald. During rush hours the tolls can skyrocket. The Herald recently saw up to $11 for the toll from Broward to State Road 836 in Miami.