Anti-littering. OK for bars, wrappers etc. but every discarded bottle on the TdF is snapped up. The penalty was 200 Sfr to start with but the riders didn't take much notice so they doubled it and got 500. Considering that I just saw an official car take half the road away from a rider in a hairpin bend I'm not surprised.
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Meanwhile, France TV commentators, the S on the end of Aravis is pronounced. We used to spend a week every year in that area.