1) I have experience on this type of Project.
2) I worked on Car Parking Project where, my Software can detect the free parking area from the Web cam's Captured Video & Image.
3) I used C++ Language for best result.
4) Your need is basically Traffic count from an Video/Image on an area/road by 'Digital Image Processing' Technology.
So, You can AWARD this Project to me.
If any question, please let me know.
Thank you & Have a nice time ahead...!