To drive California’s Express Lanes, you need a FasTrak transponder mounted in your vehicle and a funded account before you enter the lane. Solo drivers pay a toll that rises and falls with traffic; carpools with enough passengers ride free or at a discount. Each corridor is run by a different agency, so hours, occupancy rules, and toll ranges are not uniform across the state.1FasTrak. FasTrak Throughout California
Under California Vehicle Code Section 23302, entering a toll highway without a transponder linked to an account with enough balance to cover the toll is treated as evidence of a toll violation.2California Legislative Information. California Vehicle Code Section 23302 The setup matters, and so do the rules once you’re inside the lane.
What You Need Before You Enter
FasTrak sells two transponder models, and the choice depends on whether you ever carpool.
- FasTrak Standard pays tolls on bridges, toll roads, and express lanes. If you always drive alone, this covers you.
- FasTrak Flex has a three-position switch you set to 1, 2, or 3 to declare how many people are in the vehicle. Roadside equipment reads the switch and charges accordingly.1FasTrak. FasTrak Throughout California
The switch is on you. If three people are in the car but the switch reads “1,” the system charges the full solo toll and there is no way to fix it after the fact. Check the position before you merge.
Mount the transponder on the inside of the windshield near the rearview mirror. Metallic tint or a dashcam positioned too close can block the signal, and a read failure shows up on your account as an unrecognized trip.
Opening and Funding the Account
Every FasTrak account starts with a $25 prepaid balance to cover your first tolls.3FasTrak. Get FasTrak You can open one online or pick up a transponder at a participating retail location, then link its serial number to your license plate during registration.
Credit card accounts replenish automatically when the balance runs low. If you prefer not to use a card, you can fund the account with cash at participating gas stations, convenience stores, and check-cashing locations, or mail a check or money order. The minimum deposit for cash or check is $25.4FasTrak. Payment and Account Replenishment FAQs
If your balance goes negative because you forgot to add funds or your card expired, tolls still post to the account and you can end up with violation penalties on top of the unpaid tolls. A customer service representative can sometimes waive the penalty if you bring the account current quickly.5FasTrak. FAQ – Invoices and Penalties
Who Rides Free and Who Pays
Most express lanes let two occupants (HOV 2+) ride free, but certain corridors in the Bay Area and Los Angeles require three (HOV 3+). Signs at each entrance tell you which rule applies.6California Department of Transportation. High-Occupancy Vehicle Systems Carpoolers still need a FasTrak Flex switched to the correct position, or the system charges the solo rate.
Motorcycles are exempt from the occupancy requirement under California Vehicle Code Section 21655.5 and can use express lanes without paying.6California Department of Transportation. High-Occupancy Vehicle Systems Riders still need a transponder so the system can identify them. Because windshield mounting isn’t practical on a bike, the law allows the transponder to be carried in a front pocket, inside a cycle net draped over the gas tank, or in a storage compartment. Holding it up by hand while riding is illegal.7FasTrak. FasTrak Toll Tags Guide
Clean Air Vehicles No Longer Get a Break
This catches electric and plug-in hybrid drivers off guard. California’s Clean Air Vehicle decal program ended on September 30, 2025, and every decal color is now expired with no grace period.8California Air Resources Board. The End of Californias Clean Air Vehicle Decal Program As of October 1, 2025, clean air vehicles no longer receive toll discounts on express lanes or free access to carpool lanes based on their emissions status.9FasTrak. Discounts If you drive an EV or hybrid, you follow the same rules as everyone else.
How the Toll Is Priced
Tolls are not fixed. Prices adjust in real time based on congestion in the general-purpose lanes. When those lanes slow down, the express lane toll rises to keep too many vehicles from entering at once, with the goal of holding express lane traffic at roughly 45 miles per hour or faster. When demand drops, so does the price.
Electronic signs at each entry point display the current toll to specific downstream exits. You lock in the rate showing at the moment you enter, even if it jumps a minute later for the next driver. On the LA Metro ExpressLanes, tolls range from a minimum of $0.35 per mile to a maximum of $3.20 per mile as of March 2026.10Metro ExpressLanes. Latest News Other corridors set their own floor and ceiling.
When the Lanes Are Tolled
Most California Express Lanes are tolled weekdays from 5:00 a.m. to 8:00 p.m. Outside those hours and on major holidays, the lanes open to all traffic for free.11511 SF Bay. Bay Area Express Lanes Network A few corridors, like the I-80 Express Lanes in the Bay Area, operate seven days a week during the same hours.12FasTrak. Carpooling Guide The schedule isn’t universal, so check the signage.
Crossing the Line
Entry and exit points are marked by dashed white lines. Where you see double solid white lines separating the express lane from the general lanes, you cannot cross them to enter or exit. California Vehicle Code Section 21655.8 makes this a moving violation, and it’s enforced by highway patrol and cameras.13California Legislative Information. California Code Vehicle Code 21655.8 The one exception is yielding to an emergency vehicle with lights or sirens, in which case you exit the lane as soon as you safely can.
Once you’re inside the lane, overhead equipment reads your transponder and records your passage through each segment. Your account is debited automatically. You can review charges online or through monthly statements.
Rentals and the Pay-by-Plate Problem
License plate accounts, whether short-term or long-term, are not valid for express lane tolls. They work for Bay Area bridge crossings, but if you use an express lane without a physical FasTrak toll tag, you will receive a violation notice.14Bay Area FasTrak. Ways to Pay There is no pay-by-plate option for express lanes.
If you’re driving a rental, you have two options. The better one is to bring your own FasTrak transponder and temporarily add the rental car’s license plate to your account. Log in, enter the plate number with the start and end dates of your rental period, and mount your transponder on the windshield. Tolls post to your account normally.15FasTrak. Rental Vehicles Guide
The second option is your rental company’s toll payment service. Most rental agencies offer programs like TollPass or e-Toll, but not all of them cover express lane tolls. In the Bay Area, PlatePass is the only rental toll service accepted for express lanes.15FasTrak. Rental Vehicles Guide These services also add a daily convenience fee on top of tolls, which climbs quickly on a week-long trip. If you use an express lane in a rental with no valid toll arrangement, the violation notice goes to the rental company, which passes it to you along with an administrative fee.
Low-Income Toll Discounts
California runs discount programs to make express lanes more accessible. The Express Lanes START program, available in the Bay Area, offers qualifying low-income households reduced tolls on the I-880 and I-80 express lanes:
- 50% off the posted toll for driving alone
- 75% off for a two-person carpool
- Free for three or more passengers
To qualify, you need to live in one of the nine Bay Area counties and have a household income at or below 200% of the federal poverty level. For a household of one, that threshold is $31,920; for a family of four, $66,000. Proof of income can include a CalFresh card, Medi-Cal card, or your most recent tax return.16Express Lanes START. Express Lanes START The LA Metro ExpressLanes run a similar low-income assistance plan with its own eligibility criteria.
What Happens If You Don’t Pay
Express lanes use high-speed cameras that capture license plates of vehicles without valid transponders or with unreadable signals. Under California Vehicle Code Section 23302.5, toll evasion is a civil violation, not a criminal one. Penalties are handled administratively rather than in traffic court.17California Legislative Information. California Code Vehicle Code 23302.5
When the system detects an unpaid toll, the issuing agency mails a Notice of Toll Evasion to the registered owner. The first notice typically includes the unpaid toll plus a $10 penalty. If that goes unpaid, a second notice adds a steeper penalty, often around $30 on top of the toll. Paying promptly after the second notice can sometimes reduce the penalty back to $10.15FasTrak. Rental Vehicles Guide Exact amounts vary by corridor because each issuing agency sets its own penalty schedule within state law.
Ignoring the notices is where the real damage happens. If penalties remain unpaid, the issuing agency can transmit the outstanding balance to the DMV, which then refuses to renew your vehicle registration until every penny is cleared.18California Legislative Information. California Code Vehicle Code 4770 There is no minimum number of violations required to trigger this hold. Even a single unresolved notice can block your renewal.19California Department of Motor Vehicles. Parking/Toll Violations on Record
Contesting a Violation
If you believe a violation was issued in error, you have 21 days from the date the notice was issued (or 30 days from the mailing of a delinquent notice, whichever is later) to contest it. At this first stage, you don’t pay anything up front. The issuing agency investigates using its records, including toll camera photos, and mails you the results.20California Legislative Information. California Code Vehicle Code VEH 40255
If the investigation doesn’t go your way, you have 15 days from the mailing of those results to request an administrative hearing. This second stage requires a deposit. You generally need to pay the penalty amount up to $250, plus 10% of any amount above $1,000. If your household income is below 200% of the federal poverty level, you only need to deposit the toll itself, not the penalty.20California Legislative Information. California Code Vehicle Code VEH 40255 The hearing takes place within 90 days of your request, and you can attend in person, by phone, or submit your case in writing. If the hearing officer rules against you, you can file an appeal in superior court.
The common mistake is missing the 21-day window for the initial contest, which forfeits the simplest and cheapest chance to get the charge dismissed.