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BDA Junction Revisit -- Set to open on 21/05/2008 - Traffic Flow Details

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Written By Photoyogi - 19 May, 2008

BIAL Traffic Bangalore magic boxes BDA Junction

The BDA Junction is all set to be open to the public on Wednesday 21st May 2008. Here are some photo updates at the junction.







Meanwhile I had the opportunity to get a first hand idea on the proposed Traffic flow as suggested by Mr Subramanya - Commissioner BBMP who was on his regular schedule monitoring the work.

(View Large image for Details)
Here are some important points.
The Junction is proposed to have a signal free passage of traffic
The Flyover would have 4 Lanes 2 each on either direction ( 7 + 7 Meters road width)
Only Traffic headed to Cauvery Jn and from Cauvery Jn would pass over the flyover.
All other traffic is designed to flow at the lower level.
Please ref the attached Traffic flow Image.

I found 2 possible Issues that could come up
1) U Turn at NTI

We are going to have mixing of high speed vehicles headed to Cauvery Jn and the slower U turn vehicles merging right in the center of the road. We are also going to see traffic pile up at the entry of the U turn due to the not-so-easy U-turn exit.
2) the Road behind Palace Lodge is fairly narrow and is a residential area.
This re routing of traffic thru that road is going to result in some congestion.

There are some benefits of having Signal less traffic there are some hazardous effects too. For traffic from Mekhri circle towards Windsor manor Junction the first traffic junction is going to be the NTI U turn, Underpass and the turn off to Palace Road, Be prepared to see some traffic snarls.
I hope other Traffic flow experts can give their views.
Looking forward to some interesting discussions here.

Regards
--
Praveen
AkA PhotoYogi

COMMENTS

woah!!

tsubba - 19 May, 2008 - 02:21

hoola huppi!! this will take some digging into, i see some weird arrows. get back later. meanwhile, awesome work yogi, thanks for the update and welcome back.

Thanks for the BDA junction update

kbsyed61 - 19 May, 2008 - 02:38

Yogi Sir,

 Thanks for the updates.

 

Syed 

Thanks, Photoyogi

Naveen - 19 May, 2008 - 03:50

 

Nice pictures & good information, thanks.

Are the two opposing flow directions (from near NTI towards BDA Jn) separated by levels or a barrier /divider ? If so, it should be okay since in through flowing traffic conditions, even a narrow road lane is capable of handling large volumes.

The U-turn, if clearly marked, should also work well, as traffic will flow smooth without disruption on the other lane/s.

The narrow stretch behind palace lodge however, being a residential area might take some beating as all traffic headed towards Cauvery Jn from Cantonment /Palace Main gate will be passing thro' it & if there are vehicles parked, can slow traffic down as also lead to pile ups very quickly.

 

the U-turn

silkboard - 19 May, 2008 - 04:52

That NTI U-turn could be a significant issue. A separate waiting lane (for traffic coming from Mekhari Circle - so that traffic waiting for U-turn doesn't cause a big block) and then a joining lane to manage the merge should help here. You have drawn a cone/cup like thing in the image, is that the plan!?

Also, didn't understand the weird arrows between palace compound and palace lodge. Between palace lodge, and the hard divider, is there going to be traffic flowing in both directions - notice the red arrow when it emerges from the magic box, and the yellow arrows above and below it ?? Will there at least be another hard divider to separate the two directions?

I am referring this diagram:

[flickr-photo:id=2504103384,size=m]

my thoughts on the bda magic box.

bangalore-guy - 23 May, 2008 - 11:51

I happened to go over the magic boxes at the BDA junction yesterday, and my first thoughts were not very pleasant about the flyover (overpass whatever). I was going from cauvery junction towards windsor manor and there were a few things I noticed right away:

1) The ramp is a bit steep and not so smooth.

2) The approach from the cauvery junction side is not such a straight road, you need to go a little towards the right and then towards the left to align your vehicle for a proper approach.

3) The railings on the sides of the overpass/flyover should be a little more higher and stronger. I fear over enthusiastic drivers (specially at night)

Still it is a step forward and hopefully will smoothen the flow of traffic to some extent. 

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