Intersection Redesign

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    12/26/2012DTEM UET, Lahore

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    Redesign of Main LibraryChock UET, Lahore

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    Khuzaima Iqbal 2010-TE-03 Saira ramzan 2010-TE-09

    Maria khalil 2010-TE-22

    Aqsa ghafoor 2010-TE-71 Zunaira Qamar 2010-TE-74

    Saddam hussain 2010-TE-37

    Shah nawaz 2010-TE-39 Waseem zafar 2010-TE-51

    Nazam ali 2010-TE-53

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    Table of Contents

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    Existing design

    Demerits

    Possible Solutions

    Minor changings & additions in present design

    Roundabout

    Conclusion

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    Map of our site

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    NA

    TIONALLIBRARY

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    Gat

    e#3

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    6

    316

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    50956

    59

    DTEM ROAD

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    Gate#3

    The conflict points of a 4 leg intersection are 32

    DTEM ROAD

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    Faults in the Intersection

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    Clearance factor

    Sharp turns

    Improper Marking

    Insufficient Sidewalk width

    Wrong Island location

    Conflict Points

    (According to the PD of University this intersectionis designed as per desire of V.C. without anyproper study)

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    Faults in intersection

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    (According to the security center of theUniversity about 8-10 accidents have beenoccurred in the last 10 years)

    Which is a high rate of accidents on a universityroad

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    Our Possible Designs

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    Improvements in existing design

    Introduction of a Roundabout

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    Dealing with existing design

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    lets deal with the present design

    Structure changing's

    Pavement markings & signs

    Introducing speed breakers

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    Structure

    changing'sSide walk:

    At this timesidewalk is 5-9wide, we haveextend it to 8 inour design.

    As we have8000 pedestrianfor which wehave to designit.

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    8

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    Pavement

    marking

    In pavementmarking wehave introduced

    Proper lanemarking

    Zebra crossing

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    Signs

    In signs, wehaverecommended,

    Give way sign

    at every leg ofintersection

    Pedestriancrosswalk signon major roadand B.S.S.croad(westdirected road)

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    Speed

    breakers Introductionof speedbreaker (hump)

    Suggesteddimensions ofhump areShown in figure

    It is one of themost effectivespeed controlagent.

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    Introducing all these furniture, now it is ourrevised intersection

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    8

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    316

    3

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    Proposed design features

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    Features of Horizontal crosssection elements

    It is one-lane, 4 arm mini roundabout having

    15ft diameter of circular island.Each lane is 15 wide.Sidewalk of 8 is provided.Shoulder width is 2.Width of vehicle circulating area is 30ft.

    Splitter island has 2.5 ft width and 10 ft length.Natural slope of 2% is provided.

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    Proposed design features

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    Design speed of

    roundabout is 25km/h

    Operating speed is

    20km/h

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    Proposed design features

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    Stopping Sight

    distance is 85ft

    Reference : Roundabout Guidelines

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    Advantages of our solutions

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    If modifications in existing design

    Economical solution

    Control on major problem which is over speedingControl on accidents

    Reduction in conflict

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    Advantages of our solutions

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    If roundabout

    Reduce possible conflict points

    Smooth and efficient flow of traffic

    Reduce speed and ultimately accidentsEasier decision making

    require fewer traffic lanes to accommodate the sameamount of traffic

    require less right-of-way

    safer for pedestrians than intersections

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    Advantages of our solutions

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    It has smaller diameter of central island

    used in low-speed urban environments.

    accommodate pedestrians well

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    Conclusion

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    If we consider the economic factor, thenmodifications in the existing design is the best option

    If we dont consider the financial factor, thenroundabout is the best alternative

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