R/W. I am sort of pleased with that, all mile splits under 13:25 and one even under 12. Looking at the recent times for this run, apart from one that somehow went under 13 back in March, there's nothing to touch it since last July and things were different back then.
Chris - I'm trying to decide whether that's a report of a marathon or a marathon of a report. Let's just call it a marathon report of a marathon,or even a marathon marathon report. Whichever way, it's superb. I like the splits, they're very much like mine but must be somewhat better as I haven't yet cracked 6.
I hazard a guess that you have autopause set on your Garmin. That would mess up the timing at the tunnels because it thinks you've stopped when the signal doesn't get through. It happened to me once, so I now keep AP off, it doesn't really do much good anyway, except mess up the timing when you least want it to.
You're right there are two tunnels although the second is really just an over-sized underpass.