Changes

Motorway Service Station on A43 (Aire de Service de Saint-Priest)

Take tram T2 from where it starts at metro/train station Perrache to the last stop at St. Priest - Bel Air. Continue to walk in the direction of the tram 100m to the roundabout. Turn left along Rue Pierre Mendes France for 500m until you reach the roundabout at Rue du Grisard. Turn right along Rue du Grisard (which becomes Rue Jules Verne) for 1km and then turn right into Chemin de Mauguette. You will already see the motorway and petrol station in the distance. Continue walking along Chemin de Mauguette for about 600m until you get to the second gate entrance (for vehicles) to the petrol station. Google Streetview shows the gate open but when I was there it was locked, but this gate is easier to jump over than the first.