Office of Highway System Information and Performance (OHSIP)
Email Mandy Chu
Our office collects and analyzes report statistics related to the fiscal status, physical and geometric extent, performance, and designation of the State's roadway systems. This enables decision makers and system users to take advantage of quality transportation information to make performance-based decisions about transportation services and infrastructure.
What We Do
- Public roads functional classification and designation approvals;
- Coordinate State roadways, structures, and appurtenances official names;
- Work with Local Agencies to adjust Census designated urban boundaries;
- Maintain the official California Road System (CRS) maps;
- Maintain the Federally mandated Highway Performance Monitoring System (HPMS) condition and performance data;
- Officially certify the annual Maintained Mileage Report of public road mileage for the State; and
- Maintain the Traffic Accident Surveillance and Analysis System (TASAS) database.
Eric Y. Wong, Chief
Email Eric Wong
Email Branch Staff
The Highway Performance Monitoring System (HPMS) is a federally mandated inventory system and planning tool, designed by FHWA to assess the nation's highway system. HPMS was created in 1978 as a continuing, sample-based monitoring program that requires annual data reporting instead of biennial special studies. .
The Federal Highway Administration [FHWA) identifies functional classification as a key item in transportation data. Streets and highways are grouped into classes according to the service they provide. The California Road System (CRS maps) on this web site display functional classification which is used in determining Federal funding to maintain the roads. The FHWA stamp of approval is in the lower left corner of each CRS map (PDF), which makes it the official functional classification.More on Functional Classification
California Road System (CRS) Maps
The California Road System (CRS maps) display functional classification which is used in determining Federal funding to maintain the roads. The FHWA stamp of approval is in the lower left corner of each CRS map (PDF), which makes the functional classification official.
CRS Maps Web Application
National Highway System (NHS)
The NHS consists of roadways important to the nation’s economy, defense, and mobility.More on the National Highway System
- Adjusted Urban Areas
Federal transportation legislation allows for the expansion of the Census‐defined urban areas for transportation planning purposes. The adjustment process is completed through the cooperative efforts of State and local officials and approved by the Federal Highway Administration (FHWA). The Adjusted Urban Area Maps are the result of this process.More on Adjusted Urban Areas
HPMS Data Library
The Highway Performance Monitoring System (HPMS) is a continuing, sample-based monitoring program that requires annual data reporting instead of biennial special studies.
- California Public Road Data
The publications, California Public Road Data, contain statistical information derived from the Highway Performance Monitoring System (HPMS). View all available Public Road Data
Caltrans All Roads Linear Reference System (LRS) Fact Sheet
The Federal Highway Administration requires State Departments of Transportation to develop and submit a linear referencing system (LRS) network for all public roads in their respective states, known as the All Roads Network of Linear Referenced Data (ARNOLD). This requirement is an integral part of each state's federally mandated Highway Performance Monitoring System (HPMS) annual submittal.View the complete LRS Fact Sheet
- California Public Road Data
Brian Domsic, Chief
Email Brian Domsic
TSN Database - TASAS Accident Reporting
Our team maintains accident data in the TSN database for all collisions on or associated with a State highway facility.
View the 2014 Annual Collision Data on the California State Highway System.
Other TASAS Products
The TASAS Branch maintains the Place Names and Named Freeway publications.See the other TASAS Products.