Complex sentence: There are links with neighbouring France via the Fréjus and Colle di Tenda tunnels and the Montgenèvre Pass, and with Switzerland over the Simplón and Great St Bernard passes.
Split into simpler sentences: There are links with neighbouring France via the Fréjus and the Colle di Tenda tunnels as well as the Montgenèvre Pass. Piedmont also connects with Switzerland with the Simplón and Great St Bernard passes.