Finally open betas for ETS2 and ATS released and and you can check new features of the the next game patch. As always to switch to beta you have to make some actions in Steam. On the Steam client go to LIBRARY → right-click on Euro Truck Simulator 2 (or American Truck Simulator)→ Properties → Betas tab → public_beta → 1.47. No password required. Sometimes you have to restart your Steam client to see the correct branch name there.
Below you can watch my very first trip on ATS 1.47 open beta: