Chesapeake Bay Bridge-Tunnel: LP Gas Tanks Prohibited for Motorhomes

No. Motorhomes (or any vehicles) with permanently mounted LP (liquefied petroleum) gas tanks are prohibited from transiting the Chesapeake Bay Bridge-Tunnel (CBBT) in Virginia.

Official Policy

The CBBT's regulations explicitly state: "Motor homes with permanently mounted LP gas tanks (even those with automatic or manual changeover valves) are prohibited from transiting the Tunnel. This is a safety precaution due to the potential for leaks or explosions."

Rationale

The tunnel's enclosed, low-ventilation environment creates severe risk if propane leaks. Propane is heavier than air; it pools in low points, forming explosive mixtures. A spark from a vehicle, electrical fault, or static could trigger catastrophic detonation in the confined tube. The ban applies regardless of valve type or tank certification.

Alternatives for RVers

• Use removable/DOT-certified portable cylinders (allowed if secured, valves closed, capped).
• Switch to all-electric appliances (induction cooktop, electric fridge, heat pump) eliminating onboard propane.
• Take the alternate route: US-13 north to the Chesapeake Bay Bridge (Annapolis) or I-95/I-295 around the bay.

Other Restrictions

The CBBT also restricts hazardous materials, oversize/overweight vehicles without permits, and certain trailers. Always check cbbt.com for current rules before travel.

Safety in this 23-mile crossing (bridges + two tunnels) is paramount; the propane ban is non-negotiable.