DO NOT get detoured, like I did, right before the I10 tunnel and end up pointed towards the hwy 16 or 98 or Government St. tunnel. It was 12'2 clearance going west bound. Some construction got me off I10 which immediately turned me into the older tunnel...no way to escape. I just stopped, called 911 before I entered. BIG mess and construction workers kept telling me, just go on thru, it's OK...I could have shaved my 12'10 TT to 12'2 somewhere under the channel. This was several years ago, might not be a concern on I10 anymore, but I never wanted to tell a story like this one.