The SECTOR barrier has been designed to safely and cost-effectively apply high-duty vehicular access control to roadways between 3m and 6m wide. The battery backed up system ensures continued operation in the event of a power failure. The failsafe position and collision detection system has been designed and tested to set the standard in safety of operation and to provide an unparalleled level of reliability and durability in operation. The pole travel limits are managed by a sealed opto-electronic system that ensures precise position and trajectory control. Accurate and reliable collision detection ensures safe operation even under trying conditions. A precision die-cast gearbox and novel speed and trajectory control algorithm ensures smooth and rapid operation even after many years of service. The splined output coupler eliminates pole droop over time. The SECTOR control card has been designed to be easy and intuitive to use with helpful instructions on the status of the operation during and after installation.