The A83 is a major road in the south of Argyll and Bute, Scotland, running from Tarbet, on the western shore of Loch Lomond, where it splits from the A82, to Campbeltown at the southern end of the Kintyre peninsula.

The section is so named as the climb out of Glen Croe is so long and steep at the end that it was customary for travellers to rest at the top, and be thankful for having reached the highest point.

The stretch south of the Rest and Be Thankful junction has been closed on a number of occasions due to landslides, causing significant disruption to local traffic.

In March 2020 Transport Scotland said it was investing in the further construction of catch pits which it hoped would mitigate against landslides along the A83 trunk road route.

Transport Scotland has looked at Norway's processes and methods for developing and constructing tunnelling projects to deal with conditions similar to those at Rest and Be Thankful.