Let's start with maps of Atlanta and Detroit. It's quite striking how different these two cities arterial networks really are.
Legend:
1-way road (pink)
2-way road (green)
4-lane road (light blue)
6-lane road (dark blue)
boulevards (red)
Atlanta Arterials
Downtown (2.5 mile radius)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FRandom%2FAtlanta25-mile-2.jpg&hash=458c5808b0e864ad2a1538b64243aae346a5fec4)
Metro Region (25 mile radius)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FRandom%2FAtlanta25-mile-3.jpg&hash=5403f68039bbb2c1f36d72e62cf36bd72e2eda4b)
Detroit Arterials
Downtown (2.5 mile radius)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FRandom%2FDetroit25-mile-1.jpg&hash=e8a4f272f2980d459022d42bfc8c701e086d2063)
Metro Region (25 mile radius)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FRandom%2FDetroit25-mile-2.jpg&hash=85e1f9399f2bfb34bd36a3813b7747185dd267e3)
Orlando (other Florida cities have lane information too): http://www.itoworld.com/map/179#fullscreen&lat=28.5&lon=-81.5&zoom=11