The Harris County Engineering Department, Traffic Design Team 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
Traffic Planning & Design Guidelines
Traffic Impact Analysis Guidelines
Traffic Signal System Design Guidelines
Traffic Control Plan Guidelines
Guidelines for Speed Zones
Removal of Multi-Way Stop Sign Control Guidelines
Special Events Guidelines
Specifications and Detail Sheets
The following items are all links to PDF and DWG files.
Traffic Signal Standards
Traffic Signal Standard Specifications
Pavement Marking Details - Sheet 21 and 22
ADA Ramp Details - Sheet 10
Traffic Control Plan Details
Traffic Related Links & Information
Texas Manual on Uniform Traffic Control Devices (Texas MUTCD)
Local Traffic Conditions
To report traffic signal outages or trouble with signal timing, please call 713-881-3210.