Enhancements to the existing downtown traffic signal preemption system. Work includes providing labor, equipment, and materials for modifications, updates, replacement, or installation of associated traffic signal equipment and signage. Major items include 670 LF of temp. silt fence type A, 4 EA traffic signal cabinet modifications, 5 EA junction box modifications, 58 LF of STP-1 2" 14 GA conduit, 5 EA concrete foundations, 1,026 LF of 14/5 conductor cable, 370 LF of 1" PVC conduit, 230 LF of 2" bored conduit, solar power flashing beacon assemblies, wireless ethernet radios, and all required VDOT LAP acceptance testing.