LP gas concerns on our route

We lived in the Tidewater area for years and know that all area tunnels including the Chesapeake Bay Bridge Tunnel require the propane to be turned off. Since we were locals and knew the rules, we did not stop at the inspection station. The few times we stopped in the beginning, they never checked to see if it was turned off, just asked us and they told us as long as it was turned off, we did not have to stop so we didn't. We were usually crossing the Hampton Roads Bridge Tunnel and it is difficult to pull back into traffic because that route is so connected. The CBBT has much less traffic and therefore easier to stop for inspection. Things might have changed since this was about 8 years ago. I believe if you are transiting the Baltimore area you cannot take propane through the tunnel downtown and have to use an alternate route.