I have a few comments for you!
I think that the day/night loop was a bit too fast. The lighting changed after a few minutes of gameplay, which was a bit foolish IMO.
A bit slower would've been fine though. The yellow light post's light became a bit blocky at night, but the blockyness wasn't too easily visible.
The tiberium was very greatly placed (although sometimes my harvesters didn't find tiberium near my base and they went to near my enemies' bases, and got killed by some defensive structures). I had to start harvesting all the three tiberium fields which were near my base to get enough tiberium.
I think this would have been a bit better if there would have been some tiberium between the players (something to fight for).
Defending against normal ground rushes was kinda easy. Homever, defending became a bit more challenging when the AI decided to put some artillery in the high ground at the other side of the bridges going to my base, while making massive 60-infantry rushes at the same time. Although the artillery attacks failed after I built 2 banshees.
I could also make my base very easy to defend by destroying the bridges, but after I did it became harder to access tiberium.
The cities looked nice. The only negative thing I can say about them was that the cities looked really living, while there wasn't much traffic.
More traffic would've made it even better.
A nice effect would've been if the traffic would've stopped after some hours of playing. Aren't you a bit scared to drive when there are 30 tick tanks next to your car? =P
Anyways, it's a great map.