|Title:||Passenger Car Equivalents for Basic Freeway Segments on Addis Ababa – Adama Expressway|
|???metadata.dc.contributor.*???:||Bikila Teklu (PhD)|
|Keywords:||Passenger Car;Freeway Segments;Addis Ababa – Adama Expressway|
|Abstract:||In freeway traffic flow contains different types of vehicles, due to the variation of vehicles in the traffic flow the speed of passenger cars influenced by heavy vehicles, for the reason that heavy vehicles uses more driving area of the road and limited performance. Hence according to local conditions developing Passenger Car Equivalents (PCE) for trucks and buses on upgrade and down grade is an essential parameter. So the major objective of this research is to evaluate Passenger Car Equivalents (PCE) for trucks and buses for basic freeway segments on Addis Ababa – Adama Expressway and compared with that of Highway Capacity Manual 2010 provided. The data was collected from the field by using videotaping on Addis Ababa – Adama expressway in the selected sites on the basic freeway segments at every collection site for the percent grade with the corresponding grade length. And the development of Passenger Car Equivalent was carried out by transcribing the recorded video in to tabular form with proportion of trucks and buses, base flow rate and mixed flow rate and also analyzed by using Equal Flow Density method. In this study the proportion of trucks and buses considered from 10% up to 50%, the Passenger Car Equivalent increases as the proportion of trucks and buses decreases. The major variation observed in lower trucks and buses proportion non-linearly because the interaction between trucks and buses with passenger cars increases. Moreover for trucks and buses proportions from 10 % up to 50 %, the value of PCE varies in between 1.4 up to 7.8 for upgrade up to 5 % which is higher than the HCM 2010 recommended value that varies between 1.5 up to 3.0. For trucks and buses proportions of 10 %, the value of PCE varies with the length of grade in between 5.6 up to 7.8 for 5 % upgrade which is higher than the HCM 2010 recommended value that varies between 1.5 up to 3.0. The study concludes that while analyzing by using the executed Passenger Car Equivalents shows a better assumption than Passenger Car Equivalents on HCM 2010. So the executed Passenger car Equivalents for the basic freeway segment on Addis Ababa – Adama Expressway provides a realistic result while analyzing the traffic flow.|
|Appears in Collections:||Thesis - Road and Transport Engineering|
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