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I-680 Express Lanes

Located along a 14-mile stretch of southbound I-680 from State Route 84 south of Pleasanton to State Route 237 in Milpitas, the I-680 Southbound Express Lane has been in operation since September 2010. Since opening, more than 2 million solo drivers
 have chosen to use the I-680 Express Lane, reaching their destinations at speeds generally 16 mph faster than speeds motorists experience in the general purpose lanes during peak commute hours.

Along several segments within the corridor, express lane users experience speeds over 26 mph faster than drivers in the general lanes. In addition to providing drivers with reliable drive times, the lane optimizes capacity and reduces congestion in all lanes along the corridor.

Learn about the first five years of operation of the I-680 Southbound Express Lane (Sept. 2010 - Sept. 2015).

Read the FY14-15 Annual Report.

Sign Up for Express Lanes Updates

Get updates about the I-580 and I-680 Express Lanes.

I680 Map


Solo drivers who want to use the I-680 Southbound Express Lane for a more reliable trip, need to obtain and mount a FasTrak® toll tag on their windshields. Solo drivers pay a toll electronically each time they choose to use the express lane, but transit vehicles, carpools, motorcycles and eligible clean-air vehicles (with a green or white clean air vehicle decal) use the express lanes free of charge. When you are carpooling on southbound I-680, put your FasTrak toll tag in its Mylar bag to avoid being charged a toll, or use a FasTrak Flex toll tag set to 2 or 3+ for toll-free travel. Need help finding a carpool? 511 Rideshare can help.

Express lane operation is fully electronic. There are no tollbooths or traffic gates, so customers do not need to slow down or stop to pay the toll. The toll amount is deducted automatically from a solo driver’s FasTrak account.

Motorists can enter the I-680 Southbound Express Lane at three designated places. An overhead electronic sign displays the current toll being assessed. Toll costs vary based on real-time traffic levels in the Express Lane to ensure traffic in the lane continues to flow.

This process is called dynamic pricing. During peak periods, when there is more traffic in the Express Lane, the toll is higher. Tolls range from $.30 to $7.50. By changing the toll in response to the level of demand, the Express Lane traffic keeps flowing smoothly. Toll revenue pays for operating and maintaining the lane. Any excess revenue will support transit service and other improvements in the I-680 corridor.

A solo driver in the Express Lane without a valid FasTrak® toll tag is in violation of state law and subject to a fine. Law enforcement officers patrol the lane and use visual and electronic means to catch violators. Also, it is a violation for any driver to cross the double solid lines separating the Express Lane from other lanes. For questions about toll violations, please contact the FasTrak Customer Service Center online or at 877-229-8655. If you have already spoken with someone at the Customer Service Center, please fill out the form here.

The I-680 Southbound Express Lane operates Mondays to Fridays from 5 a.m. to 8 p.m. At nights and on weekends, the lane is open to all drivers for free.

The I-680 Express Lane is governed by the Sunol Smart Carpool Lane Joint Powers Authority, and was funded with State, Federal, and local funds. Alameda County’s voter-approved local sales tax Measure B provided nearly half the funding for the Express Lane. Usage of the express lane has increased steadily since inception.

As required by the California Streets and Highways Code Section 149.5 (g), in June 2013, Alameda CTC completed an I-680 Express Lane Performance Evaluation After Study that includes findings, conclusions and recommendations concerning the I-680 Express Lane including an analysis of the effect of the express lane on the adjacent general purpose lanes. The Executive Summary is also available.