For the cars, the motorikes and the caravans the best and only line is the A22 Brennero-Modena Highway, connected to the south with the A1 Milano-Napoli and the A4 Milano-Venezia motorway.
On the A22 highway (Modena - Brennero) the suggested exit for Garda Trentino is Rovereto Sud - Lago di Garda Nord, some 17 kilometers from Riva del Garda; coming from the north it is also possible to take the Trento Centro exit, and go on towards Riva del Garda on the SS 45b for about 40 kilometers. This exit is suggested mainly during the summer or in the head months, as it is undoubtedly less congested and more panoramic.
Before leaving, we’d suggest you to always check the traffic situation on the modern nav systems like the Google Maps app, and on www.viaggiareintrentino.it and Autostrade del Brennero website for the Trentino area.
To check the situation on the road from Rovereto to Garda Trentino passing by Mori, Loppio and Nago, we’d suggest you to look at the webcams here.
From Milano and Brescia you can reach Riva del Garda (in about 80 kilometers) on the Gardesana Occidentale (SS 45 bis) road; during the summer or in the most congested periods we suggest you not to drive on the Gardesana Occidentale, but rather to go on on the A4 highway until merging with the A22 motorway, and then take the Rovereto Sud, or better Trento Centro, exit as said before.