Traffic Design

The Harris County Engineering Department, Transportation and Planning page provides information, guidelines, specifications and various drawings for your use. The drawing files are in AutoCAD (dwg) format and the text based files are in the Adobe PDF format. If you do not already have the Adobe reader, it is available free for download at Adobe's web site. The following items are all links to Adobe PDF files, please left click to view them or right click and choose "save as" to download the file.

Traffic Counts/Established Speed Limits

Harris County's Traffic Counts
Houston Regional Traffic Count Maps 
Harris County's Established Speed Limits


Harris County Pedestrian Crossing Guidelines
Traffic Impact Analysis Guidelines
Traffic Signal System Design Guidelines
Guidelines for Speed Zones
Removal of Multi-Way Stop Sign Control Guidelines
Special Event Guidelines

Specifications and Detail Sheets

The following items are all links to PDF and DWG files.
Standard Engineering Design Specifications
Standard Traffic Drawings
Standard Civil Drawings 

Traffic Related Links & Information

Texas Manual on Uniform Traffic Control Devices (Texas MUTCD) 
Local Traffic Conditions

Flashing Yellow Arrow Left-Turn Brochure

To report traffic signal or school zone flashing beacon concerns, please call 713-881-3210,
or report it on a Service Request.