Quote:
Originally Posted by WarrenC12
If the region is less Vancouver-centric, that would imply less bridge crossings, since you've got "everything you need" SOF. I realize that's simplistic, but you can't argue both ways = more traffic.
Slap a $3 toll ($9 for trucks or whatever) on the GMT and we'll see it's got enough capacity at 4 lanes. 
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Sure I can argue both ways! This is the Interweb afterall.
Ok but seriously, I think I wasn't as clear as I could be in my argument. We can't assume NoF = Vancouver.
Scenario 1: Vancouver centric region
In a Vancouver centric region, the majority of people Live outside Vancouver and commute towards Vancouver to work. This actually requires less overall spanning infrastructure than a non-Vancouver centric design given our geography.
For example, you can build 1 rapid transit line (Expo) to cover all the needs of people South of Fraser. You then divert all bus (feeder) transit to feed into that SkyTrain line and throw a bunch of trains to handle the foot traffic.
For cars and trucks, again we are Vancouver focussed so while the population is increasing, the bulk of traffic is centered around rush hour. So you install HOV lanes on the bridges and people simply "suffer" through some traffic jams because that's what happens in big cities. You don't need to increase the infrastructure because the bulk of traffic crossing the Fraser River in a Vancouver centric region is again only at the 2 rush hours.
During the rest of the day and evening, cars and truck traffic should be localized aka only moving around in each city and not crossing the bridge.
Industry is in Vancouver area, people commute there, and people work there. They are only out in the burbs to live and on weekends. So infrastructure can actually be less.
So think of every city and think how it all would point to Vancouver in the above model, the model that has been used for decades in our infrastructure design. Burnaby -> Vancouver, North Van -> Vancouver, Richmond -> Vancouver, Surrey -> Vancouver, Coquitlam -> Vancouver, that's been the assumption. That means all NoF people largely stay NoF (no river crossing) and SoF people only cross the river in very specific commute windows (rush hour).
Scenario 2: Non-Vancouver centric
This is the scenario the region has shifted too but infrastructure has lagged behind. Statistics and evidence provided by numerous studies (which I won't link here for times sake but have been posted in other threads and you can just look it up on Google) show that more jobs are now outside Vancouver and daily traffic patterns have people moving around to other cities than Vancouver on a more regular basis outside those commute windows.
Most people that live in Surrey now work in Surrey for example so while you may say that counters my argument, the population in Surrey has also gone from 200,000 back in the Vancouver Centric days to 500,000 today. So the number crossing that river has still increased.
For example some maths:
Vancouver Centric:
Assume 50% working population of Surrey
Assume 80% working population travels Surrey -> Vancouver
80% of (50% of 200,000) = 80,000 crossing the Fraser River every day
Non-Vancouver Centric:
Assume 50% working population of Surrey
Assume 40% working population travels Surrey -> Vancouver
40% of (50% of 500,000) = 100,000
Net gain = 20,000 new people crossing the Fraser River despite de-centralization.
Now granted the numbers above are "made up" but I think they are reasonable in illustrating how you can become non-Vancouver centric yet still have a net-gain in people crossing that river.
Finally, the above doesn't account for more intercity travel across the Fraser. For example, you have more people now traveling to and from Richmond to Delta and vice versa, more people going between Surrey/Langley and Maple Ridge/Coquitlam, more people from Surrey to New Westminster and Burnaby and vice versa.
The statistics also show job wise we are now in situations where people are reverse commuting meaning they live in Burnaby and commute out to Langley to work or live in Richmond but work in Delta or Surrey. Heck I have a friend that lives in North Vancouver and works out in Port Kells in Surrey and another who lives in Vancouver itself and works in Coquitlam.
Being non-Vancouver Centric doesn't mean NoF stays in NoF and SoF stays in SoF. The above scenario would have been a rarity 20-30 years ago but today it is becoming the norm.
So in conclusion, I believe it is quite possible if not entirely probable that you can (and we have) shift our region away from being Vancouver centric and in turn increase the demand for infrastructure crossing the Fraser River.
That was the point I was trying to make.