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How do we calculate Congestion on roads?

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Traffic jams

B'lore has about 4200 Km road length including arterial roads which is about 20-30%. For argument sake, lets consider all the 4200 km length as major commuter carriage way.

This has certain capacity threshold beyond which speed of the vehicles will come to zero. So my question is  what is that threshold for 1 Km road length with certain width where vehicle speed becomes zero?

Based on that threshold, I should be able to calculate the following.:

For X vehicles, congestion is 100%, speed is ZERO

For X-Z vehicles, congestion is M% less, speed is 10 Kms/Hr

For X-Y vehicles congestion is (M+N) %less, Speed is 20 Kms/Hr

For X-W vehicles congestion is (M+N+O) % less, Speed is 30 Kms/Hr

Basically by means of these numbers I should be able say, in order to achieve certain % of reduction in traffic congestion, we need to have the PT system taking that much load or by way of this particular PT system with this much capacity, so much congestion reduction can be achieved.


psaram42's picture

Traffic congestion on roads

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Roads are the basic Infrastructure of any city like Bangalore [1]. The traffic congestion problem is a peak hour problem. It depends on the cities traffic pattern resulting in some definite bottle necks. The demand is also elastic. People tend to divert to alternate routes in order to avoid most congested bottle necks. Alternate routes introduce extra cost factor.

Traffic congestion is a much researched topic at many renowned Indian and USA cities [2]. 

Praja is in discussion with Cistup IISc Bangalore for more than 3 years now.

psaram42's picture

Grid Lock

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Here is a WIKIpedia artcle one coulld read for more clarity on traffic congestion. 

The term gridlock is defined as "A state of severe road congestion arising when continuous queues of vehicles block an entire network of intersecting streets, bringing traffic in all directions to a complete standstill; a traffic jam of this kind."[1] The term originates from a situation possible in a grid plan where intersections are blocked, preventing vehicles from either moving forwards through the intersection or backing up to an upstream intersection.

The term gridlock is also widely used to describe high traffic congestion with minimal flow (a "traffic jam"), whether or not a blocked grid system is involved. By extension, the term has been applied to situations in other fields where flow is stalled by excess demand, or in which competing interests prevent progress.

Taffic congestion is something different but crucial in any city traffic. Mere congestion is less important syed sab. comment guidelines

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