Complex sentence: In contrast, another tunnel through the Alps, the San Bernardino road tunnel in the canton of Graubünden further east, is relatively uncongested and shorter, but the road taken on that expressway is longer than the direct route through the St. Gotthard tunnel.
Split into simpler sentences: In contrast, another tunnel through the Alps, the San Bernardino road tunnel in the canton of Graubünden further east, is relatively uncongested and shorter. The road taken on that expressway is actually longer than the direct route through the St. Gotthard tunnel.