| 摘要 |
<p>A traffic signal (100) including a housing (202), a light source (210) disposed within the housing (262), and a door (204) operably attached to the housing (202). The door (204) is configured such that photons generated by the light source (210) may be sensed outside the housing (202). The traffic signal (100) also includes a sensor (312) attached to one of the door (204) and the housing (202).</p> |
