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Lecture 6 Bus Rapid Transit, design elements and operational issues. Dr. Muhammad Adnan. Design Elements. Corridor Demarcation Ridership Consideration Bus-type selection Alignment and cross-sectional elements Priority Junctions Bus Stop Location and its Design Scheduling and Fleet Size - PowerPoint PPT Presentation
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Lecture 6 Bus Rapid Transit, design elements and operational issues
Dr. Muhammad Adnan
Design Elements
• Corridor Demarcation• Ridership Consideration• Bus-type selection• Alignment and cross-sectional elements• Priority Junctions• Bus Stop Location and its Design• Scheduling and Fleet Size • Fare and its collection system• BRT Terminal Location
Corridor Demarcation
• Result of a Macro-level Planning Model– Four stage Modelling process
• Largely dependent on Potential Ridership• Future Consideration (LRT system Line-Feeder)
Corridor Demarcation
• Yellow Line– Dawood Chowrangi (Korangi/Landhi Industrial Area) to
Numaish Chowrangi through locations such as Qayyumabad Junction, FTC Flyover, Shahra-e-Quaideen)
-General Guidelines from AuthoritiesShould be aligned alongside Road MedianStations utilizing built-up median spaceArticulated Buses (18m length) with off-
board Fare collection
Alignment
• Features;– Identification of stretches for Separate ROW based
on situational analysis or Recky survey– Identification of stretches for operation in mixed
traffic based on situational analysis or Recky survey– Proposed Developments in future– Stretches of Bus Weaving (Left to Right lanes or vice
versa)[AASHTOO recommendation: 250m length availability in congested conditions]
– Signal Priority Junctions Identification
RUNNING WAY TYPE
Outer Exclusive Lanes
Median Exclusive Lanes
Elevated Corridor
Median
Exclusive BRTS Lane
Exclusive BRTS Lane
Outer Exclusive Lanes
MedianBRTS ELEVATED LANES
Elevated Corridor
Exclusive BRTS Lanes
Median Exclusive Lanes (At-Grade)
RUNNING WAY SEPARATION
Lane marking
Curb stones
Barrier with Fence
BRTS Lane
Lane Marking
BRTS Lane
Mixed Traffic Lanes
Mixed Traffic Lanes
BRTS Lane
Raised Curbstones
BRTS Lane
Mixed Traffic Lanes
Mixed Traffic Lanes
BRTS Lane
Barrier / Fence
BRTS Lane
Mixed Traffic Lanes
Mixed Traffic Lanes
Barrier / Fence Options
2.0 m
Normal NJ Barrier
1.2 m Fence
0.6 m
Cost per M = Rs. 15,600
2.0 m
Mini Barrier
1.6 m Fence
0.6 m
Cost per M = Rs. 16,900
1.8 m
0.6 m Cost per M = Rs. 16,600
Curb Stone
Option-1, Fence with Normal Barrier
Option-2, Fence with Mini Barrier
Option-3, Fence with Curb Stone
1.2 m
0.8 m
2.0 m
1.6 m
0.4 m
0.2 m
1.8 m Fence
STATION LOCATION
STATION
Curb Side Station
STATION
Mixed Traffic Lanes
BRTS Lane
BRTS Lane
Mixed Traffic Lanes
STATION
Median Side Station
Mixed Traffic Lanes
BRTS Lane
Mixed Traffic Lanes
BRTS Lane
Curb-side station (2 platforms) Median station (1 platform)
This configuration enables straight flow without bulging for the bus lanes.
Bus lanes have to bulge around median station
Provision of curb side stations leave one lane free for overtaking.
Overtaking is not possible without the provision of an extra lane at the station
Two different platforms have to be provided at every station which increases and maintenance cost.
A single platform involves less infrastructure and maintenance cost .
Separate stations reduce overall passenger friction and results in increased boarding and alighting efficiency.
Single platform increases passenger movement conflicts within station.
Normal passenger buses can also utilize transit corridor enhancing flexibility and allowing phased operation.
Only special BRT buses with doors on right side can use the corridor.
COMPARISION OF STATION LOCATION
LOW FLOOR BUS (+ 0.3 m) HIGH FLOOR BUS (+0.9 m)
Low floor buses 1.5~2.0 times costlier than High floor buses.
Wastages of standees space due to wheel block cut out.
Low Floor buses may easily get inundated while passing flooded street during rains.
Separate emergency door required while stopping away from stations.
COMPARISION OF VEHICLE FLOOR HEIGHT