National Road Pricing Conference
Case Studies
Salt Lake City, Utah — I-15 Express Lanes
"I-15 Express Lanes" – I-15, Salt Lake City, UT, HOV to HOT Conversion Project
Project Description
The I-15 Express Lanes in Salt Lake City, Utah, are HOT lanes that allow solo drivers to use the lanes for a fee. Implementation of this fee began September 2006 with a decal system. In early 2010, installation of an electronic payment system is scheduled, with the system expected to go live in fall 2010. A 4.1-mile extension of the corridor, called EXPRESSLink, is due to be completed at the same time.
Pricing Parameters
- Toll free for:
- 2+ carpools
- Buses
- Emergency vehicles
- Motorcycles
- Select clean-fuel vehicles
- Toll Rate - $50 per month for SOVs
- SOVs must show Express Lanes decal
Unique Features
- Flat monthly fee paid for access by SOVs, provided extra capacity is available.
Project Website
http://www.udot.utah.gov/expresslanes/
Project Goals
The conversion of the I-15 Express Lanes to the Express Pass payment system in fall 2010 will eliminate the $50/month flat fee for SOVs and replace it with a four-zone dynamic pricing scenario. This will allow UDOT to better manage traffic on I-15, by ensuring that carpooling remains a viable alternative to the general-purpose lanes. Revenues will be used to operate and maintain the Express Lanes facility.
Project Length
38 miles
Number of HOT lanes
Two lanes, one in each direction
Midpoint Access
Multiple access locations (14) spread throughout the facility.
Lane Separation
Painted stripe
Capital Costs
$125 million for EXPRESSLink expansion
Project Contact
Catherine Cutler
ccutler@utah.gov
(801) 887-3449
Version 1 8/23/10
HOT0901.0410.20