Reduction of effective road width is a common problem in everywhere of the world and in Dhaka city; it's a major problem for its huge traffic volume. This study includes an investigation to find out the cause of reduction of effective roadway width due to side friction is Dhaka city. The specific objectives of the study were to identify the factors which contribute in the Reduction of roadway width for measure the total wide loss. Reduction of roadway width due to side friction is a major problem for the people transport system. The pedestrian face many problem to walk on footpath due to site friction. When footpath is blocked for various side friction likes tea stall, shirt pant stall, paper stall, Fruit stall etc. the pedestrian tense to effective roadway width for that reason traffic jam occurs. For rapid economic, industrial and cultural growth of any county a good system of transportation is very important. As transportation comprise road ways, railways, waterways, and airways mankind has to think of a convenient and easy way for movements and this may probably be the beginning of modern roads since roadway can be width and free from side friction.
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