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Old 18th July 2014, 03:39 PM   #1 (permalink)
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Double-deckers not right fit for S'pore roads?

THEY have been a common sight on Singapore roads for decades but are double-deckers making bus transportation doubly effective?

Lee Der Horng, a transport expert at the National University of Singapore, is urging SBS Transit and SMRT to rethink their use of such buses.

Both transport operators recently announced plans to expand their fleets, with SBS Transit adding 665 buses over the next three years, including 415 double-deck Volvo B9TL Wright buses.

SMRT purchased 573 buses in April. These included 201 ADL double-deckers, a first for the operator.

There are approximately 1,360 SBS Transit double-deckers and three of SMRT's new double-deckers plying the roads now.

But Professor Lee argued: "The existing double-deckers should be put into a museum. The single-deck bus is still the most effective type of bus that should be used in Singapore.

"Singapore's traffic conditions, especially during peak hours, are not suitable for double-deckers, as they have a longer dwelling time at bus stops. This will more likely lead to bus bunching and extend the travelling time for passengers."

Prof Lee, along with researchers from the Future Cities Laboratory, a collaboration between Singapore and Swiss university ETH Zurich, found that double-deckers tend to stand 15 to 20 per cent longer than single-deck buses at each stop.

The study was conducted using anonymous ez-link smart-card data for a week's worth of bus trips. Comparing eight types of buses - including double-deckers, single-deck and bendy buses - on eight routes, the team discovered that the time taken for a passenger to alight from a double-decker is 0.2 second longer than from a single-deck bus.

The study was done based on an equal passenger to passenger ratio, to eliminate the expectation that a double-decker would have a longer dwelling time since it can hold more passengers.

One possible reason is that passengers in the upper deck may tend to wait for the bus to come to a complete stop before moving towards the exit.

Another observation by Prof Lee was that passengers in the upper deck have to wait for passengers in the lower deck to alight before they can do so.

He urged the bus operators to "pay attention to the interior layout of a bus because it does affect the overall performance".

He suggested that they consider other double-decker designs, such as the New Routemaster that is operated by ComfortDelGro's British subsidiary Metroline in London, which has wider boarding and alighting areas, and passengers can hop on and off using a third door at the rear.

They may come with a smaller seating capacity but Prof Lee suggested that the same priority seating practice adopted in trains be replicated in buses so as to ensure that those who really need seats get them.

When My Paper asked SMRT why it chose to purchase double-deckers, it said that different bus types "fulfil different passenger needs".

"Bendy buses are better suited for young children, passengers with disabilities and elderly passengers," it explained.

"Double-deck buses require less space on our roads and serve passengers on the longer trunk routes."

Paul Barter, an adjunct professor at the Lee Kuan Yew School of Public Policy, noted that keeping boarding and alighting times short is key to ensuring quicker bus trips.

"If the problems with boarding and alighting times for our current double-deckers are true, then this should be seriously considered when choosing bus types and designs."

Source: http://mypaper.sg/top-stories/double...roads-20140718

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Old 18th July 2014, 03:41 PM   #2 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

A middle finger for this expert. I love double deck bus. Who cares about the disadvantage?

What if someone block me when I want to go down? KICK THE PERSON INFRONT OF YOU. Simple right?

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Old 18th July 2014, 03:43 PM   #3 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

Noooo we all grew up with double-decker buses!

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Old 18th July 2014, 05:24 PM   #4 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

shldn't they just do a study to see the passenger numbers of double-decker buses compared to single-deck ones? If it shows that double-decker buses do take more passengers on average, then it may make it worthwhile for the slightly increased stopping time?

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Old 18th July 2014, 06:00 PM   #5 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

well majority of the passengers have no problem climbing up to the upper deck and with the roads getting more crowded its better than those long bendy buses.

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Old 18th July 2014, 08:36 PM   #6 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

So he wants single deck buses that can occupy less people as compared to double deckers and bendy buses ?

He wants more crowded buses ?

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Old 18th July 2014, 09:34 PM   #7 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

There wasnt a problem all these years why this sudden outburst

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Old 19th July 2014, 01:14 AM   #8 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

What he says makes sense, the current design does suck. Having a rear exit would allow people to tap out faster.

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Old 19th July 2014, 11:01 AM   #9 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

He's not making sense.
Two single deck buses will contribute twice as much congestion as a double deck buses! That's like common sense. Sorry but I have to say double deck buses are the way to go.

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Old 19th July 2014, 01:28 PM   #10 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

Ridiculous.

Good luck to SBS Transit and SMRT Buses if services like 28, 161, 168, 190 and 960 were to lose their majority double-deck / bendy-bus fleets and become full 12-metre single-deck fleets. Sure to have way too many buses on the roads causing even worse congestion than now. Nowadays a lot of services (not just those I mentioned) need a lot of high-capacity buses and in fact these buses are in short supply... we need more, not less.

The third door / wider doors idea is a good one though. Especially on double-deck buses which take longer to load and unload than bendies.


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Old 19th July 2014, 04:28 PM   #11 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

i wouldn't mind taking 0.2seconds longer to alight a double decker bus. Seriously, without these buses we would have to wait so much longer cause the buses are full
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Old 8th August 2014, 02:03 AM   #12 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

I think these people have been in academia for too long. It's alright to focus on just one factor for research and data collection, but making ignorant sweeping statements and impulsive correlations (perhaps it's the reporter) like that without considering the big picture misleads and misinforms people. I'd regard that article as a nonsense piece.

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Old 8th August 2014, 10:30 AM   #13 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

Singapore needs more double decker / bendy buses on roads during peak hours. I dun mind taking extra 2 seconds just to board / alight the double decker buses.

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Old 8th August 2014, 01:51 PM   #14 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

The key to smooth transport is actually not to reduce the alighting timing but rather, ensure that the bus runs on a carefully-crafted schedule, and that the drivers actually bother to follow the schedule. Anyone who have been in Japan long enough will know that their buses follow a particular time schedule that is published online and on all bus stops, and the drivers are really precise in following them. Say if a bus is scheduled to reach a bus stop at 2.00pm, as long as you reach on 1.59pm or earlier, you will definitely catch the bus. The way their buses work is that if they reach a bus stop early (due to smooth traffic condition), they will wait at the bus stop until the designated timing before moving off. And if there is delay at a certain bus stop, they will drive faster subsequently to reach the next bus stop on time. Generally, there is two rules that they follow: Arrive early but never arrive late, departs late but never departs early. As long as Singaporean buses follows a schedule together with the two rule, things like a longer alighting time is inconsequential. If the Japanese can do it, why can't we?

Also, a lesson I learnt from the Japanese transport system: Being one minute late can be very fatal.


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Old 8th August 2014, 02:35 PM   #15 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

Originally Posted by RelicDemon12 View Post
The key to smooth transport is actually not to reduce the alighting timing but rather, ensure that the bus runs on a carefully-crafted schedule, and that the drivers actually bother to follow the schedule. Anyone who have been in Japan long enough will know that their buses follow a particular time schedule that is published online and on all bus stops, and the drivers are really precise in following them. Say if a bus is scheduled to reach a bus stop at 2.00pm, as long as you reach on 1.59pm or earlier, you will definitely catch the bus. The way their buses work is that if they reach a bus stop early (due to smooth traffic condition), they will wait at the bus stop until the designated timing before moving off. And if there is delay at a certain bus stop, they will drive faster subsequently to reach the next bus stop on time. Generally, there is two rules that they follow: Arrive early but never arrive late, departs late but never departs early. As long as Singaporean buses follows a schedule together with the two rule, things like a longer alighting time is inconsequential. If the Japanese can do it, why can't we?

Also, a lesson I learnt from the Japanese transport system: Being one minute late can be very fatal.
A good idea in theory.. But with Singapore roads, it'll be chaotic when you have two or three buses waiting at the bus stop.

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Old 8th August 2014, 05:55 PM   #16 (permalink)
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Re: Double-deckers not right fit for S'pore roads?

These researchers are too buried into their findings that they forgot to use common sense. The more single decked buses on the road, the more the traffic congestion will be. Double decked buses can accommodate approximately up to twice the amount of passengers compared to the single decked buses.

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