After 10k, I realised my research had been insufficient not knowing that an upcoming tunnel was closed to bicyclists. A detour would be hundreds of kilometres, so I continued hoping to get a ride through the tunnel. Shortly after in Vernante, I stopped at an outdoor shop to look for a mug - they had no mug but more importantly told me the tunnel was closed for 4 days due to repair. Too long to arrive on time in Monaco, so the only choice was to take the train...