The A83 trunk road crosses the northern end of the peninsular passing Arrochar at the head of Loch Long and Cairndow near the head of Loch Fyne. It partly follows or runs parallel to William Caulfield's historic military road that takes its name, Rest and Be Thankful from the stone seat erected at the summit at the head of Glen Croe. As the A83 has been subject to landslips, the old route has been used as a diversionary route. The other A roads are the A815 which links the A83 with Dunoon via Strachur where the A886 leaves it and heads south via Glendaruel to Colintraive where the ferry connects it to the Isle of Bute and the A8003 which links Tighnabruaich to the A886. Other roads are secondary B roads, narrow roads or tracks.