170E HC11 Controllers are the workhorse of intersection control. Designed for ease of installation, use, and maintenance, 170E HC11 Controllers can be installed or retrofitted in a variety of industry-standard 170/2070 Cabinets, in any environment. Built in compliance with Caltrans Transportation Electrical Equipment Specification (TEES), 170E HC11 Controllers feature a modular design promoting module and component interchangeability.