A new map called Oasis has just gone live on the Overwatch public test realm, which is a nice midweek surprise. Oasis is a control map (so actually three separate stages) featuring lots of high vantage points, a jump pad and, most importantly, a busy road packed with drivers who aren't precious about running heroes over (maybe they could do with a trip to the D.VaLA). There's no Reinhardt shoulder either, so it's a pretty dangerous area.
In the name of rigorous testing, I booted up the PTR and, well, hit every Overwatch hero with a car while they were emoting. Enjoy!
If you want some actual information on Oasis, John over at Metabomb has a comprehensive guide ready to go. No news yet on whether the car is a Mei-zda or a Mercy-des Benz; more on that as we get it.