Shimla is relatively straightforward. The highway is wider and well-maintained up to most points. A 26-seater moves comfortably here.
Manali is where you need to be a bit careful. Roads beyond Kullu ,near Rohtang Pass get narrow and steep. A skilled hill-driver is non-negotiable. Most operators who regularly serve these routes have experienced drivers familiar with mountain terrain, so always confirm this before booking.
Tips:
For a group trip to either destination, booking a tempo traveller on rent in Delhi from a trusted operator ensures you get a well-maintained vehicle with a hill-experienced driver making the journey safe and comfortable.