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
LRS Architecture Support
chingsou.chervunkong@dot.ca.gov
Tim Tadlock
All Roads LRS Project Lead
tim.tadlock@dot.ca.gov
Kathleen Mohla
All Roads LRS
kathleen.mohla@dot.ca.gov
Candy Williams
All Roads LRS
candy.williams@dot.ca.gov


Last Update: November 29, 2017