Benefit Summary HTML

In California, regulatory changes in 2016 supported a transition from the Title 21 (T21) hard-cased electronic toll collection (ETC) protocol commonly used across the United States, to a newer and cheaper transponder sticker technology identified in ISO Standard 18000-63, also known as the 6C protocol.

Hyperlink Exit Door
Last Modified Date
Priority Research Area
Publication Sort Date
California DOT Caltrans
Result Type
Source ID
Transitioning from Title 21 Protocol to the 6C Electronic Toll Collection Protocol: A Standardized Regulatory Impact Assessment
Source Review
External URL Disclaimer

(Our website has many links to other organizations. While we offer these electronic linkages for your convenience in accessing transportation-related information, please be aware that when you exit our website, the privacy and accessibility policies stated on our website may not be the same as that on other websites.)