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](/media/u0cjmji0/img-how-it-works-collage-2x.png)
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](/media/smchz3sx/405-fastrak-sticker-transponder-interior-mounted-2x.png)
- Transparent sticker attaches to the inside of your windshield
- Sticker is free for 405 express lanes account holders
![fastrack exterior mounted](/media/launuxl5/405-fastrak-exterior-sticker-transponder-2x.png)
- 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](/media/clyhy1ku/405-fastrak-flex-switchable-transponder-2x.png)
- 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.
![image of transponder on windshield](/media/exrnsvf5/405-interior-mounted-transponder-2x.png)
Exterior Transponder
The exterior transponder is for motorcyclists and vehicles with metalized windshields.
![image of transponder on headlight](/media/t0shwx2u/405-fastrak-exterior-mounted-transponder-2x.png)
FasTrak Flex® Switchable Transponder
The FasTrak Flex® Switchable Transponder is for use inside your vehicle.
![image of transponder on windshield](/media/3rthzcmc/405-fastrak-flex-switchable-transponder-2x.png)
FasTrak Sticker Transponder
The FasTrak Sticker Transponder is for use inside your vehicle.
![image of transponder on windshield](/media/exrnsvf5/405-interior-mounted-transponder-2x.png)
Exterior Transponder
The exterior transponder is for motorcyclists and vehicles with metalized windshields.
![image of transponder on headlight](/media/t0shwx2u/405-fastrak-exterior-mounted-transponder-2x.png)
FasTrak Flex® Switchable Transponder
The FasTrak Flex® Switchable Transponder is for use inside your vehicle.
![image of transponder on windshield](/media/3rthzcmc/405-fastrak-flex-switchable-transponder-2x.png)