WPS is the nations leading supplier of specialized test equipment for the transportation professional. From troubleshooting & calibration tools for the signal technician, to sophisticated traffic modeling & simulation tools for the traffic engineer, find what you need at WPS.  Each of our testers are designed to be upgradeable and expandable to meet future technology, as new field devices are implemented. We don't sell any test equipment that we don't use ourselves in our field service division. This assures you the customer, that what you find in our store will indeed be a useful, worthwhile, and quality tool. Compatibility with multiple brands and manufacturers is an important consideration when selecting a test fixture. We strive to bench test every available and known component in the industry on our testers. This assures both compatibility between products, as well as allowing us to be better prepared in instructing you on setting the equipment up in your own shop.