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Old 9th October 2014, 14:59   #46
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Default Re: Are Flyovers the solution to traffic congestion?

IMHO, flyovers are very much needed in cities, and they serve their purpose wherever they are built - to reduce traffic congestions at junctions. We can't blame a smooth traffic at one junction for the bottleneck at another. And like some places where flyovers create other traffic problems, it's the brains who designed the flyovers to be blamed, for bad design. Had they designed it in a better way, everything would've been going smooth.

Many people take their own vehicles because public transport is not great here - not just because flyovers are comfortable to drive on. Buses are jam-packed at peak hours. Who'll spend 500 Rs on Petrol and drive in city when he or she can safely and comfortably travel in public transport for 100 Rs? Even if the route is full of flyovers I won't do it.

Take the example of Singapore. There are lot of flyovers and good infrastructure for traffic. But people travel by buses and metro all the time. The high taxes on cars and best in the world public transport system make them do so - and they're not sacrificing anything by travelling in public transport. Bad infrastructure will also force people to take public transport. But it's a frustrating way of pushing people.

Flyovers are good. But improperly designed ones aren't. One flyover at one junction or a few flyovers at some junctions will not resolve the entire city's traffic problems. Good infrastructure and better public transport is they way forward.
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Old 9th October 2014, 17:51   #47
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Default Re: Are Flyovers the solution to traffic congestion?

IMHO the root cause of traffic congestion is lack of basic driving discipline.

If we closely observe some of the reasons why we end up sitting in traffic for an additional 1-2 hours, none of them involve flyovers or even lack of multiple lanes. Its all got to do with non-existent discipline. For e.g.:

1) Breaking the queue and trying to join-in much ahead by driving on the lane meant for on-coming traffic.
2) Assuming Amber and Red are slight variations in color shades and choosing to cross the signal on Red even if there is a line of vehicles halfway through the common area waiting to clear out.
3) U-Turn in a really tight spot - especially during peak traffic!!!
4) Blocking junctions and mini-junctions (extension to point (2), but applicable in areas where there is no traffic signal)

And the worst part is each of these reason has a domino effect. It will start with one - and soon you have more joining in leading to a chaotic catch-22 situation.

I am inclined to believe, if we are able to put a minimal amount of discipline as an absolute necessity for ALL drivers, we can all save time. And, as to how we can achieve it - I am still in search for answers
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Old 9th October 2014, 20:24   #48
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Default Re: Are Flyovers the solution to traffic congestion?

Without any doubt, flyovers are a tremendous help in easing traffic. If you look at any expressway/ motorway/ freeway in the world, you will see a lot of elevated sections which are essentially flyovers. A simple question will make us realise the truth: who amongst us chooses to not take a flyover and would rather go under it and cross after negotiating traffic lights? Apart from some isolated case, no one would choose not to take an available flyover. Those saying that flyovers simply transfer the problem down the road are mistaken. Without the flyover, there would have been a problem at the first junction as well as one at the next one. If one has to travel 20 kms and there are 50 junctions, it is far better to have 40 of them signal free even if the other 10 are jammed than to have delays at signals at all 50 junctions.

Now when we come to new roads and flyovers also getting choked, that is simply a matter of rising demand. The same happens to electricity supply but no one says that we should go back to candles. As demand increases, we have to keep on building more power plants. There is no doubt that public transport would be preferable. We are building metro systems in most major cities. We are improving bus networks. This doesn't mean that roads should be abandoned. Roads, metro, monorail, water ways are all parts of the solution. Delhi metro is already full and we are adding more coaches and building more lines instead of closing it down.

Arguments against development are produced by some biased people from developed world who have already developed their nations to the hilt but cry hoarse when developing nations try to add infrastructure.
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Old 12th October 2014, 12:43   #49
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Default Re: Are Flyovers the solution to traffic congestion?

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Originally Posted by pratika View Post

Similarly, I think flyovers are constructed to address a bottleneck point. They have the effect of shifting bottleneck from the point they were constructed to some other place on the road that has more constraints,.
Exactly my point ! Instead of eliminating bottlenecks, flyovers simply transfer the bottleneck from one place to another.

A well planned road ( stretch of road ) should take into account the volume of traffic expected and the elimination of bottlenecks should be considered not just at one junction or the next but for the entire stretch

In Bangalore : ORR bridge landing towards ecospace , Marathahalli bridge landing on to Kundanahalli , Domlur fly over landing on the Indiranagar 80ft road , TIN factory etc are all case in point here.

Easier said than done, its simply because of jurisdiction issues i guess , contractor generally gets a job only for a particular point / junction rather than for designing and entire stretch ( which is quite rare)

High time the principles of transportation engineering are applied when it comes to roadway design and layout, even then practical issues like road widening ( read land acquisition), large malls/building coming up pouring traffic onto the road, access to parallel residential areas looms large over the implementation.

Jayanagar is a good example in Bangalore to emulate.

I so pity the pedestrians/employees who work at Ecospace, its so dangerous to cross that stretch both for motorists and pedestrians, wonder who "planned" it.
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Old 12th October 2014, 21:26   #50
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Default Re: Are Flyovers the solution to traffic congestion?

Most Mumbai folks will completely disagree with this.

The best example would be the Eastern Freeway for us. A trip from Vashi to CST that took us well over an hour now doesn't take more than 30 minutes.

Flyovers are meant to eliminate bottlenecks and they have worked brilliantly for us I reckon.
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Old 6th September 2015, 19:50   #51
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Default Re: Are Flyovers the solution to traffic congestion?

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Originally Posted by arnabchak View Post
In most of the cases, it is not the solution.

Case in case, the Aarey Flyover after Hub Mall in Jogeshwari is a prime reason for the serpentine traffic jams on the Western Express Highway
Completely agree with you, not sure if there has been any effort or initiative on the part of Mumbai Traffic Police to either widen the flyover or any other measures like widening the service roads etc
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Old 7th September 2015, 10:26   #52
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Default Re: Are Flyovers the solution to traffic congestion?

Flyovers, when properly implemented can prove to be a good solution for directing traffic away from the multiple traffic signals which are a major cause for bottlenecks.

But most of the flyovers are constructed without any consideration or thought on making the lives of commuters easier and safer. Case in point is the flyover on Sinhagad road which begins after Abhiruchi mall. 70 percent of traffic on this road turns below the flyover to go to Dhayari and only 20-25 percent use the flyover to proceed to Nanded city. The rest go under the flyover to take a U-turn or park their vehicles there.
Yet, the flyover occupies 3/4th of the road width leaving only a small road space for 70% of the traffic.

Leave alone flyovers, seeing the rate at which vehicle density is increasing daily and the fact that roads cannot be widened beyond a limit due to improper planning, I think the only solution (besides introducing congestion tax, allowing even numbered vehicles on specific days etc) is to construct continuous parallel roads one above the other.
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Old 8th September 2015, 10:51   #53
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Default Re: Are Flyovers the solution to traffic congestion?

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Originally Posted by The Observer View Post
Exactly my point ! Instead of eliminating bottlenecks, flyovers simply transfer the bottleneck from one place to another.

A well planned road ( stretch of road ) should take into account the volume of traffic expected and the elimination of bottlenecks should be considered not just at one junction or the next but for the entire stretch


High time the principles of transportation engineering are applied when it comes to roadway design and layout, even then practical issues like road widening ( read land acquisition), large malls/building coming up pouring traffic onto the road, access to parallel residential areas looms large over the implementation.

.
Agree.. Flyovers in india are like spot fixes , fix the spot and shift the problem. There are basically two issues which need to be fixed. Lack of adequate planning data .. I don't know if the planners have any long term , accurate data on vehicular number available for planning. Secondly without proper holistic planning across a wide urban area , the traffic is going to pile up at the first constriction point negating all the investment in flyovers prior to the point. I guess this is a price to pay in our country due to rapid growth concentrated in limited urban areas, while any planning is based on forecast which at best are guess estimates. Take the example of the relatively new flyover to Bangalore airport.. Any guesses on how long it will be able to take the load ? Some estimates suggest another 3 years with the present growth rates !! Any solutions beyond 3 years ? None.. wait for the airport metro which is nowhere on the radar.
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Old 8th September 2015, 13:00   #54
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Default Re: Are Flyovers the solution to traffic congestion?

Many times flyovers are built without anticipation of traffic growth and sometimes common sense.
So in many cases I see that flyovers if not planned with proper exits and entrances to where they are being built often end up being the troublemakers themselves. The many twin terrors at regular intervals on the Outer Ring Road in Bangalore are good examples.
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Old 8th September 2015, 13:56   #55
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Interesting thread. I feel flyovers are best to take away traffic from city or bring it in from other cities. Consider the vashi-panvel section of sion panvel highway. People going southward from Mumbai can easily get out.

On the other side, Palm Beach road has no flyovers yet it doesn't jam. Mainly due to ban of trucks and good maintenance.

Inside the city, making flyovers may not be always useful unless the road under them is also utilized for traffic flow. The bridge at sion and JJ have actually doubled up roads on the same area.

I think having disciplined drivers and roundabouts will be able to solve traffic issues at busy intersections at a very low price compared to bridging it.
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Old 8th September 2015, 14:13   #56
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Default Re: Are Flyovers the solution to traffic congestion?

Flyovers solve issues at a specific point. In our cities where the jams occur at almost every intersection, you need expressway sorts to make some difference. Even these might not work since the entry and exit may prove as bottlenecks.
So they do help a bit but not entirely.
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Old 8th September 2015, 17:57   #57
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Default Re: Are Flyovers the solution to traffic congestion?

It is true that flyovers provide respite from traffic at traffic signals and intersections but they are useful only when they are part of proper planning for traffic and vehicular movement. Only when Flyovers just like Rail over bridges and underpasses are key component of the city traffic and vehicular plan, then they are effective otherwise they do not solve the problem in any way - just like the silk board junction flyover or the numerous flyovers on the outer ring road in Delhi where the traffic is stranded even on flyovers.

I think it is important for those in charge of traffic control and management in cities to pay attention to the following points

1) In cities, do not mix long distance and short distance traffic. It is a good sign that lot of elevated roads are being constructed but i think this has to be part of master plan of any future city development etc.
2) Instead of flyover, look at underpasses as they are better and do not obstruct the skyline and thus do not have impact on business establishments on the side of the road.
3) Create dedicated corridor for cycles and two wheelers. It is very ironic that Gurgaon Expressway has just prohibited plying of two wheelers without making any provision for them. Today two wheelers are forced to not only break the law but risk riding with cars and buses. I think each Highway should have a dedicated lane for two wheelers, cycles, auto and local transport. Our policy makers just close their eyes to the problem.
4) Enforce traffic discipline through carrot and stick approach and spend money in creating awareness. Create some brand ambassdors of good behaviour, give some incentive etc. Encouraging good behaviour should get more focus than punishing bad behaviour.
5) Through smarter designs, try to eliminate crossings like they have in some stretches of Noida.
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