Thankx for your reply, thewireguys.
NVR software is yet to be decided. IR illuminator will be used at night and vehicles do not stay in one lane. It is just one big open road.
Mobotix is out of our budget. Looking for a more economical alternative. We can shell out upto $650 per camera. So far camera specs as follows:
2 or 3 MP IP camera with 1/2" progressive scan lens.
Verifocal 5 to 50mm lens
WDR,
IR cut off
Auto IRIS
Any help further is appreciated