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DISASTER ROUTES

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Los Angeles County street centerlines, which serve as Primary Disaster Routes (freeways and highways) and Secondary Disaster Routes (highways and other roads).

Street centerlines are from the CAMS_ROADS dataset (2015-09-09, 2018-07-18).

Disaster Routes description courtesy of LA County DPW Disaster Routes website (http://dpw.lacounty.gov/dsg/disasterroutes/):

“Disaster Routes play a primary role in disaster response and recovery. During a disaster and immediately following, Disaster Routes are used to transport emergency personnel, equipment, and supplies into an affected area in order to save lives, protect property, and minimize impact to the environment. During a disaster, Disaster Routes have priority for clearing, repairing and restoration over other roads.

It should be noted that Disaster Routes are not evacuation routes. Although an emergency may warrant that a road be used as both a Disaster Route and an evacuation route, they are considered to be different. An evacuation route is used to move an affected population out of an impacted area.”

According to the CAMS_ROADS metadata (http://egis3.lacounty.gov/dataportal/2014/06/16/2011-la-county-street-centerline-street-address-file/), this file should NOT be used for 1) routing and network analysis, and 2) jurisdiction and pavement management.

Some on and off ramps are included for road continuity purposes. In addition, freeway transitions tend to be labeled as ramps in CAMS_ROADS.

Download the data here.

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Data Field Descriptions

FIELD Type_DisRte
ALIAS Type_DisRte
FIELD DESCRIPTION
Type of Disaster Route. "Primary" refers to freeways. "Secondary" refers to highways and other roads. "Ramps" are included, in some cases, for freeway transitions and road continuity purposes.

The following fields and field descriptions are from CAMS_ROADS:

FIELD SourceID
ALIAS SourceID
FIELD DESCRIPTION

FIELD Type
ALIAS Type
FIELD DESCRIPTION
Street Type - used for display and labelling

FIELD Elevation
ALIAS Elevation
FIELD DESCRIPTION
The level of the street (0 = ground, 1 = 1st level interchange, -1 = tunnel, etc). This is not complete (do not use at this time)

FIELD Surface
ALIAS Surface
FIELD DESCRIPTION
Surface Type (paved, unpaved) - not complete at this time (do not use)

FIELD Status
ALIAS Status
FIELD DESCRIPTION
Status of the road - not complete at this time (do not use)

FIELD DrivingDir
ALIAS DrivingDir
FIELD DESCRIPTION
Driving Direction

FIELD From_L
ALIAS From_L
FIELD DESCRIPTION
Starting Address (left side of arc)

FIELD From_R
ALIAS From_R
FIELD DESCRIPTION
Starting address (right side of arc)

FIELD To_L
ALIAS To_L
FIELD DESCRIPTION
Ending address (left side of arc)

FIELD To_R
ALIAS To_R
FIELD DESCRIPTION
Ending address (right side of arc)

FIELD NameCat_L
ALIAS NameCat_L
FIELD DESCRIPTION
Name Category (Primary, Secondary)

FIELD NameCat_R
ALIAS NameCat_R
FIELD DESCRIPTION
Name Category (Primary, Secondary)

FIELD Source
ALIAS Source
FIELD DESCRIPTION
Street Source (TIGER, CAMS, South Bay COG, etc)

FIELD FullName
ALIAS FullName
FIELD DESCRIPTION
Fully concatenated Street Name for labelling

FIELD UpdateDate
ALIAS UpdateDate
FIELD DESCRIPTION
Last Date updated


GIS Source Information
Database Name: eGIS_Transportation
Feature Class Name: OEM_DISASTER_ROUTES
Feature Dataset Name (if applicable):
Reference Date: 1998
Accuracy: TIGER
Update Frequency: Other
Access Constraints:None

Contact Information
Margaret Carlin
GIS Project Supervisor
Los Angeles County
Chief Executive Office
500 W. Temple St.
Room 781
Los Angeles, CA 90012
mcarlin@ceooem.lacounty.gov
(323) 980-2295

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