Often in the traffic jam reports: the A3 between Zurich and Chur (direction San Bernardino).
The Marché Glarnerland offers a good opportunity to take a break here. It's best to park near the gas station immediately after leaving the motorway, because that's where the door is.
You decide whether a shorter or longer break, a Robidog and enough paths are at your disposal.
If you want to eat something, dogs are allowed in the restaurant (not in the self-service area and also not in the Coop).