The general speed limit in Switzerland is 80 km/h (50 mph) outside and 50 km/h (31 mph) inside build-up areas. These limits were introduced in 1984 to protect the environment. On the motorways of Switzerland the limit is 120 km/h (75 mph). The limit on the similar autostrassen is 100 km/h (62 mph). There are lower limits for trucks and vehicles with trailers.
Here is a timeline of speed limits: All limits are in km/h.