Intersection Redesign
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Transcript of Intersection Redesign
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12/26/2012DTEM UET, Lahore
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Redesign of Main LibraryChock UET, Lahore
12/26/2012DTEM UET, Lahore
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12/26/2012DTEM UET, Lahore
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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12/26/2012DTEM UET, Lahore
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Gat
e#3
30
31
6
316
335
284
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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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)
12/26/2012DTEM UET, Lahore
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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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12/26/2012DTEM UET, Lahore
Introducing all these furniture, now it is ourrevised intersection
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8
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32
316
3
16
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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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12/26/2012DTEM UET Lahore