... any implementation of parking/congestion charges should have reduction in number of entries made into CBD, and pollution levels in CBD as targets, with some clear number goals, from X to Y

Do we know the numbers today? No, and that perhaps is the first difference with Stockholm :)

 All those who dont want to pay for parking please leave comments on the reason so we can put it forward to the authorities. Please vote, so we can take this proposal to the elected representatives. We know Traffic Police & BBMP both want to do this. Politicians will do it only if we all come up and say we want it. 

Appx costs, taking high end transport options for PT vs private. Only because we are assuming that parking fee hike is aimed at car users.

PT option

• Avg public transport cost of going to CBD from Outer Ring = Rs 30 (Vajra fare).
• Do x 2 for return = Rs 60

Private option

• Car, 20 Kms Petrol = 70 Rs (appx)
• 2 hour parking = Rs 40, so total = Rs 110.

PT looks cheaper (Rs 60 vs 70). Adding for parking, the gap increases (Rs 60 vs Rs 110). Right? Now, take hidden costs for PT, two big ones. (leave the inconvenience out)

• Auto till bus stand = Rs 25-40 depending on auto raja. x 2 for round trip! So avg Rs 60
• Time "wastage" (due to auto/bus wait/slow bus) for using PT (bus) = 40 minutes (20 minutes each way). Put a number to your time? Rs 60 @ Rs 100/hr. Rs 120 @ 200/hr, and so on :)

Now, you see how PT "costs" more than private transport !! So, net net:

• Depending on the value of your time, even if PT becomes 3 times as cheap, it would still not make the cut.
• How much you charge for parking at CBD, and entering CBD, decides what "segment" of commuters you will be "pushing" or "attracting" to PT.

Summary?

• Keep PT as sad as it is today, and auto rajas moody and grumpy ==> parking charges in CBD would be a good business.
• Improve PT, fix auto rajas or last mile ==> parking charges in CBD would be welfare, good for PT.

So let us ask our city planners, do they see parking as business, or welfare? Love money, or love PT?

SB,

Differences in commuting costs though relevant, might not matter too much to many people. Whilst your summation is somewhat revealing, I think most users of high-end PT (presently, only air-conditioned buses, & later Metro/Mono) use them primarily because they wish to avoid the stress of driving to work & back in the present chaotic traffic conditions - the thought of driving to & fro over long distances in peak hour traffic is not appealing to most.

In this context, additional parking costs will be a dampener & urge more people to switch to PT. If parking is provided for using PT through TTMCs & at peripheral Metro stations, it will do away with the last mile "auto" component & might see a lot more using PT. If such parking is subsidized when PT is used, it has a great chance of getting traffic volumes down. Thus, parking costs can play a hand in keeping a lid on traffic volumes.

 Stockholm and Bangalore? Apples and oranges.

Why?