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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

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]

U-Turn At NTI -- Needed?

Photoyogi - 19 May, 2008 - 05:34

Hi Silkboard, Will try an reply to your questions inline:
SB>> "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"
Praveen>> Please note the exit from the cauvery Underpass is also adding traffic to this very same U-turn Lane. When the "airport traffic" starts i do see this as a problem. SB>> "here. You have drawn a cone/cup like thing in the image, is that the plan!?" Praveen>> That cone like structure already has been constructed and i was told its pukka. (I will re-edit this post with pictures some time later this evening)
SB>> 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?"
Praveen>> OK i guess I could have done better at sketch will try to see how i can refine the schematic. The Red and Blue arrows represent traffic that flows above the Flyover. All the yellow arrows arrows are slower traffic at the road level. [flickr-photo:id=2502883868,size=m] This is a photo towards Palace / Cantt Station. I was told in there would be a small circle / Umbrella for Cop in the middle.
There would be Water filled plastic separators that have been marked in the schematic that is online. So what happens is when you look at traffic from Mekhri circle to Windsor manor Jn there is a U turn to Malleswaram / Guttahalli passing thru the Magic box. This is what came to my mind:
The U turn at NTI can be eliminated and the Magic box @ BDA be used as a pass thru as well as a U turn back towards Cauvery Junction, with suitable alteration in the traffic patern. that way the narrow road behind Palace lodge can remain a less used road too. This will also ensure the traffic flow towards the cauvery Jn will be smooth.
On second thoughts, I assume the cauvery Junction is not wide enought to handle higher density faster movement, this NTI Uturn will work as a buffer (read speed breaker) to  the oncoming traffic, there by make it look more smooth.
Any views on this SB/TS others?
--
Praveen Sundaram
AkA PhotoYogi

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.

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