dear mohanty,

pl refer this links which may useful for you.

all the best

http://cvrr.ucsd.edu/publications/2012/Morris_ITS2012.pdf

http://www.ictct.org/media/Book-of-Abstacts-ICTCT-Final.pdf

https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/Sen-dev2013-traffic.pdf

Do you mean DENSITY (vehicles per length unit) or VOLUME (vehicles per time unit)?

It's very hard to have an accurate density's values with simple videos, but your can estimate the density in every time interval by considering the headways (simple to estimate from videos). Namely, you calculate the mean headway x inverse (1/x) to estimate the density

Hi Mr. Malaya 

You can see this application 

http://www.picomixer.com/STA.html 

Please prefer to this link. Hope that is useful for you.

Article Comparative Evaluation of Density Estimation Methods on Diff...