Things to know if you are a Commercial Vehicle traveling the CBBT


  • To view Hazmat Regulations as it pertains to vehicles crossing the CBBT, click here.
  • For compressed gas regulations, click here.
  • Maximum vehicle height is 13′-6″.
  • Maximum vehicle width is 14′.
  • Minimum safe speed is 45 mph.
  • Maximum safe speed is 55 mph.
  • All vehicles are subject to inspection.

Special Over-Dimensional Vehicles:

  • An escort is required for all special over-dimension vehicles, i.e. vehicles unable to maintain 45 mph, exceeding 84,000, 100′ in length or 10′-6″ in width.
  • Prior approval is required for all over-dimensional vehicles requiring an escort.  Please call 757.331.2960 in advance to schedule the crossing.  24-hour notice is requested.
  • No escorts are run on weekends or holidays.