California Department of Transportation

Mailing Address:

Department of Transportation
Division of DRISI-HQ, MS #38
P.O. Box 942874
Sacramento, CA 94272-0001

FAX: 654-6583








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Linear Referencing System (LRS) Branch

The Linear Referencing System (LRS) is the visual representation of the California state highway system as described in the Caltrans Transportation System Network (TSN). The LRS is used to map postmile events. The LRS Branch is also developing the capability to map events along the “off-system” (local roads). This capability is being developed in response to a Federal Highway Administration mandate to create an All Roads Network of Linear Referenced Data (ARNOLD). LRS branch staff are tasked with maintaining and calibrating the LRS database and responding to requests for postmile event data.

LRS Branch Staff

Gerald Schumacher
Chief, LRS Branch
gerald.schumacher@dot.ca.gov
Keith Chervunkong
All Roads LRS Project Lead
chingsou.chervunkong@dot.ca.gov
Lars Olson
All Roads LRS and On-System LRS maintenance specialist
lars.olson@dot.ca.gov
Tim Tadlock
On-System LRS Project Lead
tim.tadlock@dot.ca.gov


Last Update: August 22, 2016