I have looked at the map several times,but the most expeditious driving route from Zürich to St.Moritz is not all that obvious to me.

If I had to do it tomorrow, I would go by Chur because it seems to offer the longer stretch of autobahn. Then I would take the autoverlad option to avoid some of the narrow passes that seem to be the alternative.

Advice and opinions please.

>Then I would take the autoverlad option to avoid some of the narrow passes that seem to be the alternative.

If the weather plays along, you can use the Julier Pass route - it is a well built road.

I didn't know the Autoverlad runs in summer too, but it seems to be a good alternative in not so favourable weather.

Bob, the fastest route is most likely Autobahn via Chur to Thusis, the major road via Tiefencastel and Julier Pass to St. Moritz.

I personally like the Albula Pass route from Tiefencastel via Filisur-Bergün-Preda more. It is more scenic IMO, has less traffic (especially less trucks) and it runs along the famous rail route with all the viaducts, spiral tunnels etc. It's quite a sight! The road is not too narrow IMO and easy to drive.

The Julier Pass road is annoying with the heavy traffic - trucks and cars, bikers ...