Traffic finally flows across CBI Jn Magic Box

We have seen many infra companies doing a very good job in laying roads..including l&T. All it needs is the right approach to lay roads.. one possible explanation for BDA doing this is to open the road for traffic early and reduce congestion! but inturn help the tyre seller cartel! :P btw videos are that much better!

Doc, This magic Box at CBI junction is a much needed help for the people who live in the vicinity. The Magic box is at the width of the National Highway -7 (connecting B'lore & Hyderabad) and it is also the major connectivity road to new airport. This road carries lot of heavy traffic and now added airport traffic. There is a justification for Magic Box on this particular junction. The question is whether this has been done the right way by taking care of the ped Xings? For better perspective go thru' this thread: CBI junction Magic Box Syed

Doc, These are 2 junctions regulated with traffic lights. Please bear in mind that this particular stretch is not more than 4 lane road (2 on each side). Staggered ped Crossing would help if the traffic is not mixed with trucks. What you saw on the video is ride from BIA side going towards Mekhri Circle (or may be vice-versa). With this magic box, they have removed the signal at CBI junction. I am assuming they are regulating the traffic from CBI junction onto NH-7 (Bellary Road) through the magic box. The magic box is underneath the NH-7. Magic box is a good solution provided they have executed right. Since I am also current not based in Bangalore, I have not visited the site physically to ascertain the answers for my question. Hoping PhotoYogi can shed more light on this. Syed

Pedestrians don't feature in most plans. At best as an after thought. They fend for themselves. Footpaths/sidewalks are considered a luxury in Bangalore. The BBMP has crores of rupees to spend on flyovers but none to spend on sidewalks. Srivathsa

ASJ, this place is better served by what will be implemented - for once. It is an arterial road connecting north with city center and south. Pedestrian facilities is always an after thought but they have actually made a magic box subway at the end of the flyover(The video doesnt go that far) which probably hasnt been opened yet. So cross overs are there but I dont know about pavement on the sides. BUt knowing the BBMP i doubt it will have anything that will be gold standard. I doubt they will even make it to IRC standard. Praveen had to cut short the shoot to go back and collect parts of his car that were strewn all over the place - just kidding.

>>One problem with these structures is the aesthetics. All >>these structure are an eyesore. There is nothing called >>symmetry and everything seams to be so adhoc. Even the >>railing and the medians are so uneven. Without the trees it >>is even bad. Magic Box is a good solution but needs to be executed right. I reside here and used to take occasional walks to the construction site. I found that there is hardly anyone to Monitor the work for Quality. The Execution part is totally Adhoc. Right from fitting the boxes to concreting the outerwalls. Seems like Engineering is left to construction workers (reducing cost ?) . There is definete need to executer Neater , the final outcome should like one that is a Engineered . however if one ignore the looks CBI Junction Magic box is wide enough and this is a plus.

ASJ, You are right - quickfix is the right term for these 'Magic boxes', as they are called. The only advantage is that they can be assembled, compressed & the roads brought back to service in very quick time. Since pre-cast 'U' shaped elements are used, their size /weight has to be limited to facilitate transporting them from casting yard to works site. The maximum width of these underpasses is about 6 mtrs, but at this width, the load of the elements becomes very huge due to strength requirements for truck & other heavy traffic that will pass over them. Heavy lifting gear is required to position them on-site. They have some useful applications, such as for arranging pedestrian subways across busy roads or for arranging right turn exits from thoroughfares. However, our city has started fitting these narrow grade separators wherever they want to get rid of signals, & arrange uninterrupted flow of traffic, such as the long stretch of road leading to the new airport. Pretty soon, the traffic volumes are bound to increase & then, we will have long rows of traffic waiting to pass through these 'Magic Boxes'. My suggestion to BBMP was to use this only to permit buses (public transport) through them & for BRT, so that they do not saturate with excessive traffic over time, but they allow all traffic to use them. Thus, this is a short-sighted solution.

Basically Bangalore and Pune (plus other cities) are having to pay for lack of foresight. I have attempted to show the difference between highways and city roads in another post and if our civic planners had any clue, they will have ensured no development happens within 30 meters of NH. But they allowed it and with every new development came another junction that crossed the highway. Now their solution to overcome lack of foresight is perhaps affected by the same pathos i.e. lack of foresight. I will now attempt to share what I might have done rather than rely on my memroy of what I may have seen in Sussex 14 years ago!! Lets begin with the basic concept of junction free highways. As seen above, every few miles, the left lane on either side of the 3 + 3 lane highway becomes an exit and entry point and intervening brown section made part of hard shoulder. Now there is a problem here, the two sides on either side are divorced completely. Typically, the solution is to have flyover connect two sides. This is seen below on a section of M1 motorway in UK Note the sat image showing the flyover connecting two sides (station road). Now this could well have been an underpass, but it would have remained completely delinked with the actual highway. Instead, in India, what we are attempting now is to build flyovers after flyovers (now along with these magic boxes) at every junction we have allowed to crop up along the (so called) highway. What may be the solution? The solution is to create what I have in the first image above. To do this in the current circumstances is rather difficult, but ideally, this is what ought to be considered - Create entry and exit points as shown above on either side with intervening portion (shown as brown) having only 2 lanes on the highway. This intervening portion will not have any junctions any more. This will need repeating strategically along the highway and between each entry/exit junctions, the highway will become non-accecssible. But what makes the magic boxes even more badly planned is the treatment given to the Bellary road at the junction with CV Ramana road and further downstream at when it meets the ORR. With the above already in place what may be done other than magic boxes Its amazing that with two decent free-flow systems in place on either side, the need to overcome junctions at Sanjaynagar and CBI junctions was / is attempted using Magic boxes rather than - As seen above, all junctions between the two free-flow systems should be blocked off completely (red lines along the highway). And all traffic made to join the highway only via the free-flow systems on either side. This may be a slight detour, but on the highway the traffic moves without junctions. And as its the latter alone which can be done realistically, the objective is achieved without excess spending. The only reason then for considering a magic box, is to let pedestrians across (and by making ramps rather than steps, it more or less becomes disabled friendly too). Ideally this question will not arise as technically highways should be devoid of all pedestrians, but the circumstances are such that urban growth has been allowed too close to the NH. ASJ

Bottom line is - its not signal free as authorities want us to believe, only the highway is made signal free and everyone else has to go through some agony (as you describe with regards to Mekhri circle). The cheapest option would have been to combine what I show above in image 3 and 5 above (no road works would have been needed at all - I would have elaborated only that as an option but did not bother because its too late, given what is in place at Mekhri circle). I blame the people / drivers who put pressures on the authorities to provide non-stop driving experience. Part of living an urban life is 'delays' and hence need to build an attribute called 'patience'. A city will have junctions, a city will have roads which are clogged up (more so when PT is planned and implemented inadequately) - that is life, that is reality, we need to accept it. The authorities should be blamed for poor foresight, inadequate planning and then repeated knee-jerk measures bowing to public pressures. The Commissioner should say to the public - if you are frustrated by having to sit at junctions and traffic lights, leave your cars at home and use the buses. People would then automatically put same amount of pressure they put for wider roads and signal free junctions on bus service providers to come up with goods with regards route and frequency rationalisation. Right now we are looping around, solve problem at one junction, transfer problem to next junction and so on. Add to this the concept of 'induced congestion' where because people are told a certain stretch is widened or has magic boxes and flyovers - everyone starts using it, result - more congestion. From garden city to city of magic boxes or dare I say match-boxes is what is in store. And right now everyone is taken by the euphoria and the spin created by the word 'magic' and the story of how these implements can be put in place in 72 hours. Keenly await the Jug handle, but ultimately when we look up freeway designs we have no option but to use clover leaf and stacked (mulit layered) entry / exits - this is the only way to create signal free junctions. Unfortunately (or perhaps fortunately), the designs are such that one needs more space as well as money to make these. In fact, a minute or two that I have spent scanning the ORR (via google maps), it too has junctions, and who ever is promising to make ORR signal free must have either got their plans wrong or have lots of money to invest or a brilliant engineers who deserve a medal - time will tell. ASJ PS: Again, this feedback ought to be sent to the authorities, otherwise our discussions are academic

3 mts was very small..4.5 is small too! However approaches for all MUP's shd be something as in the image below to facilitate smoother flow..

Shri R Ashok and Shri Katta Subrahmanya Naidu are not happy with the design: http://www.hindu.com/2008...

Having a one man show running the lives of 8 million people and growing is proving very costly for bangalore. The sooner we have an elected council in place, the better! Atleast people blogging here can interact with the councillors when approving such road designs.

parcetamol doesnt..! :) So one thing I have observed with bangaloreans is that they are too eager to fill any space available with their vehicles..so we need to be 'herded' like sheep to move in line..forcefully if needed.. So my thought was that guide ways should help!

mcadambi, I hope these are not the routine ruling party criticism for the works of previous governments projects. At last the ruling ministers found time to look ta the magic boxes. I am sure these Mbs are in use for last 6 months or so and misnisters has use them in their various election campaigns. Still, better late than never. Finding faults, criticizing designs and construction is not going to do anything. Unless these criticism are converted into opportunities to correct anomalies. I would look forward to the correction these MBs would be getting in coming days.