Tag/E-ZPass payments on November 1, 2007. All toll lanes including E-ZPass-only lanes are gated for safety concerns and to turn around inadmissible vehicles. For example: Strong winds have blown over certain vehicles. Therefore, some vehicles are banned when the wind speed exceeds . Level 6 wind restrictions with hurricane-force winds (at least , i.e., approaching the wind speed of a Category 1 hurricane, which is at least ), and other inclement weather conditions ban all traffic. Hazardous materials and compressed gas require various restrictions and inspections to safeguard the tunnels. Both tunnels have a height limit of . An over-height truck in April 2007 severely damaged the tunnels. Repairs took three weeks. Should police activities, accidents, or closures stop traffic from moving freely, gates prevent drivers from entering and then being forced to either back up within the narrow space or to wait too long in the middle of the bridge–tunnel. The bridge–tunnel management prohibits bicycles but offers a shuttle van for $15. Cyclists must call ahead. It is mandatory that the bridge be checked and serviced every five years. Since servicing the bridge takes about five years, the process is a continuous cycle. The CBBT is one of only two automobile transportation facilities in Virginia with its own police department; the other is the Richmond Metropolitan Authority Toll Road Police. By original charter from the state, it has authority to enforce the laws of Virginia. Emergency call boxes are spaced at half-mile (0.8 km) intervals. Tourism The CBBT promotes the bridge–tunnel as not only a transportation facility to tourist destinations to the north and south, but as a destination itself. For travelers headed elsewhere, the bridge–tunnel can save more than of driving for those headed between Ocean City, MD; Rehoboth Beach, DE, Fenwick Island, DE, and Wilmington, DE (and areas north) and the Virginia Beach area or the Outer Banks of North Carolina, according to the CBBT district. Unlike the Interstate Highways that travelers would avoid by taking the bridge–tunnel, the roads in the shortcut have traffic lights. On the Delmarva peninsula to the north of the bridge, travelers may visit nearby Kiptopeke State Park, Eastern Shore National Wildlife Refuge, Fisherman Island National Wildlife Refuge (closed to the public), Assateague Island National Seashore, NASA's Wallops Flight Facility, campgrounds and other vacation destinations. To the south are tourist destinations around Virginia Beach, including First Landing State Park, Norfolk Botanical Garden,