We passed through the border patrol with no problems but they are checking all cars and trucks for refugees. This is something new as before there were always open borders.
Austria has a population of 8.6 million in 84,000sq km. Vienna has about 2 million people, densely populated (4200 people per sq km). Whereas the Czech Republic was very flat, Austria has lovely rolling hills. We stopped in Baden for lunch, a really cute town, they had a flea market that we wandered around and then had lunch.
We then stopped in the Vienna Woods...so pretty and green!