About Transponders

The 405 Express Lanes operates with a state-of-the-art electronic toll collection system which requires a FasTrak® transponder.

The transponder-based system allows travel without stopping to pay a toll at a toll booth. FasTrak® transponders are required for customers to use the express lanes.

Person driving in their car

Transponders

The 405 Express Lanes offers three types of transponders. Based on your vehicle type, either an interior- or exterior-mounted FasTrak® sticker transponder will be provided with your account at no charge. Take advantage of carpool discounts, a switchable transponder is required and can be purchased through the 405 Express Lanes for $15.

If you have an existing transponder and an active account from any toll agency in California, you can use your FasTrak® transponder on any toll road in California.

fastrack sicker
FasTrak Sticker
  • Transparent sticker attaches to the inside of your windshield
  • Sticker is free for 405 express lanes account holders
fastrack exterior mounted
FasTrak Exterior Mounted
  • Transparent sticker attaches to the front headlight of your vehicle
  • Can be used by motorcyclists to drive the 405 Express Lanes for free
  • Sticker is free for 405 Express Lanes accountholders
fastrack flex switchable
FasTrak Flex® Switchable
  • Can be used by qualifying drivers to receive a carpool discount
  • Includes a switch that allows the driver to indicate the number of occupants in the vehicle
  • Can be purchased through the 405 Express Lanes for $15

How to Install

FasTrak Sticker Transponder

The FasTrak Sticker Transponder is for use inside your vehicle.

Step 1
Prep the surface
Clean mounting area inside of windshield and let dry.
Step 2
Place sticker behind rearview mirror
Peel backing and affix to inside windshield, smoothing the sticker flat or pressing the switchable transponder’s adhesive strips firmly against the glass behind the rearview mirror.
image of transponder on windshield
FasTrak Interior Mounted Sticker Transponder
Place sticker behind rearview mirror.

Exterior Transponder

The exterior transponder is for motorcyclists and vehicles with metalized windshields.

Step 1
Prep the headlight
Clean and dry the vehicle headlight in the chosen tag placement area.
Step 2
Carefully peel the sticker
Carefully remove the transponder sticker tag by peeling the backing down from the tag. Minimize contact with the adhesive of the backing, and avoid sharply bending or folding the tag.
Step 3
Place sticker over headlight of car or motorcycle
Locate a position on the headlight at least 2 inches from any metal and smoothly press the transponder against the headlight surface working from on end to avoid tapping air bubbles.
image of transponder on headlight
Exterior Mounted Transponder
Place sticker over headlight of car or motorcycle.

FasTrak Flex® Switchable Transponder

The FasTrak Flex® Switchable Transponder is for use inside your vehicle.

Step 1
Prep the surface
Clean mounting area inside of windshield and let dry.
Step 2
Using the Dual Lock fastener
Peel off the protective liner from each piece of Dual Lock on the back of the transponder. Minimize contact with the adhesive backing.
Step 3
Positioning the transponder
Press the sticky side of the transponder to the lower left of the interior windshield. Push firmly.
image of transponder on windshield
FasTrak Flex Switchable Transponder
Place on the lower left of the interior windshield.

FasTrak Sticker Transponder

The FasTrak Sticker Transponder is for use inside your vehicle.

Step 1
Prep the surface
Clean mounting area inside of windshield and let dry.
Step 2
Place sticker behind rearview mirror
Peel backing and affix to inside windshield, smoothing the sticker flat or pressing the switchable transponder’s adhesive strips firmly against the glass behind the rearview mirror.
image of transponder on windshield
FasTrak Interior Mounted Sticker Transponder
Place sticker behind rearview mirror.

Exterior Transponder

The exterior transponder is for motorcyclists and vehicles with metalized windshields.

Step 1
Prep the headlight
Clean and dry the vehicle headlight in the chosen tag placement area.
Step 2
Carefully peel the sticker
Carefully remove the transponder sticker tag by peeling the backing down from the tag. Minimize contact with the adhesive of the backing, and avoid sharply bending or folding the tag.
Step 3
Place sticker over headlight of car or motorcycle
Locate a position on the headlight at least 2 inches from any metal and smoothly press the transponder against the headlight surface working from on end to avoid tapping air bubbles.
image of transponder on headlight
Exterior Mounted Transponder
Place sticker over headlight of car or motorcycle.

FasTrak Flex® Switchable Transponder

The FasTrak Flex® Switchable Transponder is for use inside your vehicle.

Step 1
Prep the surface
Clean mounting area inside of windshield and let dry.
Step 2
Using the Dual Lock fastener
Peel off the protective liner from each piece of Dual Lock on the back of the transponder. Minimize contact with the adhesive backing.
Step 3
Positioning the transponder
Press the sticky side of the transponder to the lower left of the interior windshield. Push firmly.
image of transponder on windshield
FasTrak Flex Switchable Transponder
Place on the lower left of the interior windshield.

Questions about transponders?