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Materials Engineering and Testing Services
Office of Roadway Materials Testing
Electrical Testing Branch
OVERVIEW
State Furnished Transportation Electrical Equipment
The Translab tests all state furnished traffic signal intersection devices to ensure that the products meet the current Department of Transportation needs as listed in the Transportation Electrical Equipment Specifications (TEES, dated March 2009).
Some of the most common state furnished electrical materials inspected:
Battery Backup Systems (BBS) Changeable Message Signs (CMS) LED Traffic Signal Modules Sign Lighting Street Maintenance Lighting 332L / 334L / 336L Cabinets 170E / 2070E Controllers Magnetic and Inductive Loop Detectors Modems Conflict Monitors Isolators and Load Switches
Contractor Furnished Transportation Electrical Equipment
The Translab ensures that the California Department of Transportation meets the Federal Highway Administration's (FHWA) Federal-Aid Policy Guide, Title 23 the Code of Federal Regulations.
These regulations necessitate that each State Highway Agency develop a quality assurance program which will assure that the materials and workmanship incorporated into each federal-aid highway construction project are in conformity with the requirements of the approved plans and specifications, including approved changes.
Some of the most common contractor furnished electrical materials inspected:
Closed Circuit Television Systems (CCTV) Service Pedestals Telephone Demarcation Cabinets (TDC) Extinguishable Message Signs (EMS) Luminaires Sign Lighting Microwave Vieo Detection Systems (MVDS) Traffic Signal Heads Flashing Beacons Pullboxes, Conduit, and Conductors
New Product Evaluation
New Products are fully developed, marketable products for use in construction, maintenance, and operation of the States Transportation System. These are products which Caltrans has not previously evaluated and which are not covered by existing specifications or requirements. These also could be products which are validation of performance prior to approved products which have been modified or an existing product sold by a new supplier.
For more detail on New Product Evaluation, please refer to this website:
http://www.dot.ca.gov/hq/esc/Translab/NewProducts/pdf/guidelines.pdf
Some recent products we have evaluated:
Light Pipe LED Smart Studs Solar Power Lighting Induction Lighting Portable LED Changeable Message Sign LED EMS
Testing
We test state furnished and contractor furnished transportation electrical equipment for compliance to the specifications according to the ANSI/ASQC Z1.4 sampling chart.
Testing includes but is not limited to:
Physical Inspection Burn-in Tests -37degC to +74degC Environmental Testing Load Testing of Power Supplies Testing of all Interconnect Wiring Performance Testing Under Extreme Conditions (temperature, Noise Interference etc.) Documentation
How does this benefit the Department of Transportation?
Benefits:
Ensures all Electrical Equipment are Compliant With State Specifications Ensures all Electrical Equipment are Operational before Field Installation Faster Delivery to Job Sites Less Problems during Installation Reduced Maintenance Costs
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METS_webmaster@dot.ca.gov