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snippet: To identify all streets in Los Angeles County that are a part of the Master Plan of Highways.
summary: To identify all streets in Los Angeles County that are a part of the Master Plan of Highways.
accessInformation: Los Angeles County Department of Regional Planning GIS Section
thumbnail:
maxScale: 5000
typeKeywords: []
description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Master Plan of Highways was originally developed by the County of Los Angeles Department of Public Works (DPW); it designates roadways in Los Angeles County by their planned capacity. Categories include major highway, secondary highway, limited secondary highway, parkway, and expressway</SPAN></P><P><SPAN STYLE="font-weight:bold;">UPDATE HISTORY:</SPAN></P><UL><LI><P><SPAN>12/27/12 - for latest updates reflected in the Santa Clarita Valley Area Plan--went into effect on this day.</SPAN></P></LI><LI><P><SPAN>6/17/15 - for latest updated reflected in the Antelope Valley Area Plan, adopted by the Board of Supervisors on 6/16/15.</SPAN></P></LI><LI><P><SPAN>11/5/15 - for latest updates reflected in the General Plan 2035, adopted by the Board of Supervisors on 10/6/15 - effective on this day.</SPAN></P></LI><LI><P><SPAN>1/10/17 - for removal of Limited Secondary Highway near Castaic along Sloan Canyon. Adopted by BOS on 12/20/16 (link to BOS resolution is </SPAN><A href="http://file.lacounty.gov/SDSInter/bos/supdocs/110027.pdf" STYLE="text-decoration:underline;"><SPAN>here</SPAN></A><SPAN>).</SPAN></P></LI><LI><P><SPAN>5/30/19 - for the adoption of the Centennial Specific Plan (which became effective on this day). A link to the BOS resolution is </SPAN><A href="http://file.lacounty.gov/SDSInter/bos/supdocs/135112.pdf" STYLE="text-decoration:underline;"><SPAN>here</SPAN></A><SPAN>.</SPAN></P></LI><LI><P><SPAN>4/9/25 - for the adoption of the South Bay Area Plan, removal of Del Amo Blvd between Normandie Ave and Vermont Ave.</SPAN></P></LI><LI><P><SPAN STYLE="font-weight:bold;">12/11/25 - Due to a court order, Los Angeles County has vacated all approvals for the Centennial Specific Plan and suspended all project activities until CEQA deficiencies are corrected. Therefore, this GIS layer reflects the data as it was adopted by the Antelope Valley Area Plan in 2015 (Centennial was adopted in 2019).</SPAN></P></LI></UL></DIV></DIV></DIV>
licenseInfo: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None</SPAN></P></DIV></DIV></DIV>
catalogPath:
title: Master Plan of Highways
type:
url:
tags: ["highway plan"]
culture: en-US
name:
guid:
minScale: 150000000
spatialReference: