The Swiss authorities online
Where are there traffic jams or closed roads and where is there likely to be heavy traffic?
Sources of information on the current traffic situation:
Traffic news on the website of DRS public radio: Presented in graphic and list form by road type (motorway, expressway, other roads, tunnels, car-train and mountain pass).
Weekly traffic forecasts for Switzerland on the TCS website:
Heavy rain, strong winds and high temperatures can create difficult road conditions.
If you break down, call 140 for 24-hour breakdown assistance (CHF 0.20 / call). For the police call 117. For the ambulance service call 144. Both numbers are free of charge.