[QUOTE="Whinging Courier"] <makes notes> I don't get much of an opportunity to "do" tunnels round here; they're either 20mph limits or very crowded. There's one I can think of near a certain cider shop I'll be going to next week and will try it then :o)[/QUOTE] heh The Barry-Baker Tunnel (North of the Golden Gate Bridge) is one-way (controlled by traffic signals) and is about a half mile long. The signal interval is about 5 minutes. I split to the front of the queue and blast off at the green light. It's a fucking hoot between hitting the rev limiter and the burble when you back off on the throttle.