Lane Closure System


The Department has standardized its road and lane closure reporting into a statewide Lane Closure System (LCS). Every five minutes LCS reports all approved closures planned for the next 7 days, plus all current lane, ramp, and road closures due to maintenance, construction, special events, etc.

File formats include CSV, JSON, TXT and XML. Each file format contains the same data set. These files are available for integration into your application and are available via the HTTPS protocol. There is no charge for the use of this data.

Conditions of Use

Please read the Conditions Of Use before using these data sets.


Data Format and File Layout

Data is available in four file formats that contain the same information to allow easy integration into your application. Included below are the file format layouts:

Data Description

Data in each of these file formats are defined in the following documents:

File Locations

Data sets are broken up by Caltrans Districts.