Hi Mohammed

Please note that the term "traffic density" is rarely used in traffic engineering and analysis. But Traffic volume (vehicles per day or vehicles per hour) is the term frequently used. Please refer books on Transportation Engineering Handbook or Traffic Engineering Practice. We normally say "low trafficked road" or "high trafficked road".

Best regards

Ravi

Dear Sinnappoo (Ravi) Ravindran

Thank you for correction the term of "traffic density" to "Traffic volume".

regards

First, you do not specify whether you are looking at signalized locations or general highway lanes.

If at a signalized approach in an urban setting, per AASHTO, the per-lane capacity is between 500 and 700 veh/hr. The typical per-lane capacity of a highway is 2,000-2,200 vpl. Now you can have a basis to determine high vs low demand.

Let’s assume that at 80% of the capacities I cited above is LOS D, then you can do the math that at volumes below the D threshold, you are at low to moderate conditions.

Of course this is simplistic because there is no accounting for local conditions such as the presence of high turning volumes, weaving conditions at closely spaced ramps, lane widths, and the like. But at least you have some sort of threshold to start with.

Thank you Steven P. Scalici P.E.

Dear

Traffic density is used in conjestion studies at urban area to verify if the roadway geometrics are suitable.

May you can refer to Traffic Engineering book

I recommand

Traffic engineering theory and practice

By Pignataro

I was taught by Lou Pignataro...my only concern is the book is over 40 years old, and while the fundamentals never change, I would add to that reference by looking for a later reference offered by the Institute of Transportation Engineers (ITE).

Click on this link...

https://ecommerce.ite.org/IMIS/ItemDetail?iProductCode=LP-691