#capacity, #gap, Critical Gap at Roundabouts by Indo-HCM Method

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Critical gap, follow up time at roundabouts, Lag, Indo-HCM Method of determination of critical gap at roundabout, Root Mean Square Method, rejected gap, accepted gap, maximization function, Capacity of Roundabouts.

Traffic Engineering

Highway Engineering

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Sir, Thank you very much for explaining a complex concept of rejected gap, critical gap and accepted gap in an extremely simple and crystal clear manner. Explanation of the Excel tools for computations is also very useful to person, not so adept in usage of spread sheets. May consider to discuss the concept of effective green time and approach delay at intersections in your future videos. Another concept which puzzles me is the safety of combinations of intersections between various types of roads, viz. Highways, Arterials, MDRs & ODRs, Collector streets, Distributor streets and Local streets and Village roads. May be you, could throw light on this. Thank you and regards.

ashwanigupta
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thank you sir for this informative video, sir can we use this method to estimate critical gap at T unsignalized intersection ??

onkarbidkar
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Happy Birthday and Happy Teacher's day Dear sir

asifulislam
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Can this method be applied to unsignalized intersections ?

aydnaydin
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Sir Is this approach of root mean square method is applicable for only two lanes approach road ? Or we can use this method for six lane divided approach too?

ravalshivangi
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One more question: We need a pair of data for each vehicle. They are the highest rejeceted and accepted gap..

Lets assume there are no vehicles are coming from the main road. "In this case, the vehicle joining the main road can proceed without waiting, meaning there is no maximum rejected gap.

What will we do in this case? Are we going to exclude this vehicle from evaluation?

aydnaydin
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Thank you Sir for this informative video. However I have some queries. How many observations should we make from any particular population of vehicles in a rotary? How can we come to know that these observations are sufficient to get the desired result?

ayushmanguha