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Treatment of Junctions

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Treatment of Junctions Treatment of Junctions Volume I FINAL REPORT Section B5: Maharagama Town Transportation Research and Study Centre University of Moratuwa Sri Lanka 15 th January 2010 Table of Contents CHAPTER 1 INTRODUCTION ................................................................................................... 1-1 1.1 Location ............................................................................................................................... 1-1 1.2 Land Use .............................................................................................................................. 1-1 1.3 Transport Node .................................................................................................................... 1-1 1.4 Road Network ...................................................................................................................... 1-3 1.5 Pedestrian Facilities ............................................................................................................. 1-3 1.6 Traffic Management ............................................................................................................. 1-4 1.7 Parking ................................................................................................................................. 1-4 1.8 Railway Gate Closure .......................................................................................................... 1-5 1.9 Bus Terminals & Stops ........................................................................................................ 1-5 1.10 Scope .................................................................................................................................... 1-8 1.11 Data Collection .................................................................................................................... 1-9 CHAPTER 2 TRAFFIC ANALYSIS ............................................................................................ 2-1 2.1 Road Infrastructure .............................................................................................................. 2-1 2.2 Link Flows ........................................................................................................................... 2-4 2.3 Flows at Junctions ................................................................................................................ 2-8 3.4 Speed and delay ................................................................................................................. 2-10 2.4 Pedestrian Flows ................................................................................................................ 2-13 2.5 Bus Stands .......................................................................................................................... 2-14 2.6 Railway Station and Passengers ......................................................................................... 2-15 2.7 Accident Studies ................................................................................................................ 2-16 3.11 Summary of Problems ........................................................................................................ 2-17 CHAPTER 3 PROPOSED SOLUTIONS ...................................................................................... 3-1 i | P a g e 3.1 Option 1: Signalization of Clock Tower Junction with Two-way traffic on A4 Road ........ 3-1 3.1.1 Signal Design ............................................................................................................... 3-3 3.1.2 Other supplementary improvement to signalization .................................................... 3-5 3.1.3 Centralization of the Bus Terminals ............................................................................ 3-5 4.2 Option 2: Flyover ................................................................................................................. 3-8 3.1.1 Impact of Flyover on Urban Landscape ..................................................................... 3-10 CHAPTER 4 COST BENEFIT ANALYSIS ................................................................................. 4-1 4.1 Benefits ................................................................................................................................ 4-1 4.2 Traffic Analysis ................................................................................................................... 4-1 4.3 Economic Benefits ............................................................................................................... 4-2 4.4 Cost-Benefit Analysis ........................................................................................................ 4-11 4.4.1 Signalization Option .................................................................................................. 4-11 4.4.2 Flyover Option ........................................................................................................... 4-13 4.5 Non-Quantifiable Benefits ................................................................................................. 4-14 CHAPTER 5 CONCLUSIONS ...................................................................................................... 5-1 CHAPTER 6 RECOMMENDATION ........................................................................................... 6-1 ii | P a g e List of Tables Table 1-1: Details of Surveys Carried Out _____________________________________________ 1-9 Table 2-1: The cross sectional details of the road links in the study area ______________________ 2-1 Table 2-2: ADT on Links __________________________________________________________ 2-5 Table 2-3: ADT at Junctions ________________________________________________________ 2-9 Table 2-4:Summary of Link Speeds(km/h) ___________________________________________ 2-11 Table 2-5: Details at different Bus Terminals in the study area ____________________________ 2-15 Table 2-6: Accidents Recorded within Study Area (8 months of 2008) ______________________ 2-16 Table 3-1: Items and the Quantities for Improvement in the Study Area ______________________ 3-2 Table 3-2: Cost Estimates for Signalization and improvements to the Roads in the Study Area ____ 3-3 Table 3-3: Cost of the Proposed Bus Stand and the Bus Park Development ___________________ 3-7 Table 3-4: Cost Estimate for Flyover _________________________________________________ 3-9 Table 4-1: Economic Analysis for Signalization Option __________________________________ 4-3 Table 4-2: Economic Analysis for Flyover Option _______________________________________ 4-7 Table 4-3: Cost Benefit Analysis for Signalization Option _______________________________ 4-12 Table 4-4: Cost Benefit Analysis for Flyover Option ____________________________________ 4-13 iii | P a g e Table of Figures Figure 1-1: Area Map showing Dehiwala, Nugegoda, Battaramulla areas _____________________ 1-2 Figure 1-2: Map of Study Area ______________________________________________________ 1-4 Figure 1-3: Typical Road Conditions in the Study Area ___________________________________ 1-8 Figure 2-1: Road Link and Lane configuration of Maharagama City Area ____________________ 2-2 Figure 2-2: Pedestrian paths between High level Road and the Old Road _____________________ 2-3 Figure 2-3: Traffic Flow Diagrams (ADT by Major Vehicle Groups) ________________________ 2-8 Figure 2-4: Total daily one-way (Outwards )Movements of Buses from each bus stops of the Study area ___________________________________________________________________________ 2-9 Figure 2-5: Travel Time Survey Points _____________________________________________ 2-10 Figure 2-6: Speeds (km/hr) for Typical Movements (P.M. Peak) __________________________ 2-12 Figure 2-7: Hourly pedestrian movements across the Main Roads at Pedestrian Crossings ______ 2-14 Figure 2-8: Location of Bus Terminals in Maharagama Town _____________________________ 2-15 Figure 2-9: Locations of accidents within Study Area ___________________________________ 2-17 Figure 3-1: Lane configuration and extent of improvements to roads. ________________________ 3-2 Figure 3-2: Estimated Two way traffic at Clock Tower Junction ________________________ 3-4 Figure 3-3: Cycle time of the two phase system during the day time at Clock Tower Junction 3-5 Figure 3-4: Linkage between Bus Terminal, Bus Park and Railway Station ___________________ 3-6 Figure 3-5: Proposed Bus Stand and Proposed Bus Circulation Plan _________________________ 3-8 Figure 3-6: Longitudinal Section of the proposed flyover _________________________________ 3-9 Figure 6-1 (a to c)- Map of Maharagama Study Area showing recommended improvements ______ 6-3 iv | P a g e Treatment of Junctions- Volume I: Final Report CHAPTER 1 INTRODUCTION 1.1 Location Maharagama Town is located between the 13 th km and 14 th km on the Colombo –Ratnapura- Wellawaya-Batticaloa or (A4) Road. This road is also known as the CRWB Road as well as the High Level Road. In this report we shall refer to it as the A4. The A4 Road has two lane width beyond Nugegoda. Maharagama is the town centre that connects roads to several other suburban cities such as Dehiwala via Boralesgamuwa, Nugegoda, Homagama and Battaramulla via Pamunuwa and also Piliyandala. The Maharagama City is also served by the Kelani Valley Railway which is a single track line. (Figure 1.1) 1.2 Land Use The land use in the Maharagama Town area is mainly commercial. There are a number of vocational training centres such as the Maharagama National Youth
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