Since I can’t seem to find any nice sweepy roads that are actually wide enough, I’ve taken the liberty to make some Tilke-ish designs.
http://www.gmap-pedometer.com/?r=5764183 (clockwise)
A lot of straights leading into sharp corners or chicanes, one flowing part leading into a sharp right hander, more sillyness with straights and sharp turns, a weird construction leading into the end of the lap. There’s even a few bridges!
http://www.gmap-pedometer.com/?r=5764191 (anti-clockwise)
More 90-degree chicaney goodness. It has some longer straights, I think setting the car up would be challenge, as well as the silly way I’ve led the track around the statue/roundabout.
http://www.gmap-pedometer.com/?r=5764195 (clockwise)
An even faster track. Very basic, although the last sector would be very tricky.
I tried some more designs, but it’s mostly highway and barely any side streets, so it’s hard to not make a track with 1 kilometer long straights and 90 degree bends.