On 4/25/2018 7:03 AM, wrote:
On Monday, April 23, 2018 at 11:21:36 AM UTC-4, sms wrote:
On 4/22/2018 4:27 AM, Duane wrote:

snip

Delays due to traffic congestion increase exponentially with more
vehicles, not linearly. A 10% reduction in the number of vehicles, by
whatever means, would greatly reduce congestion in my area.

snip

That's not been the case in NYC. There have been yearly cordon counts dating back to the 1960's. All taxi trip origin/destination and elapsed time data has been available since 2009. This permits estimating speed (congestion) within any area in the city.

The results show that within Manhattan's CBD (below 60th St), cordon counts across the CBD boundary are at 30+ year lows. The results also show that average speeds are also decreasing.


In many cities, what is contributing to increased congestion is the
decrease in the use of public transit and the increase in the use of
services like Uber and Lyft.

https://www.citylab.com/transportation/2017/12/how-to-fix-new-york-citys-unsustainable-traffic-woes/548798/

Investor-subsidized ride services like Uber and Lyft versus
taxpayer-subsidized public transit. The former is not sustainable,
Uber's loss jumped 61 percent to $4.5 billion in 2017, but if they can
eliminate the cost of paying drivers with the use of self-driving cars
they could turn things around. Lyft is not doing quite as badly, their
losses are at least decreasing.