Travel by Bikes in Cities
On 9/11, I have nothing smart to add to the national discussion so I will change topics. Note the picture below. It graphs time trends in the share of workers who commute by bike. There are large differences across liberal cities with respect to biking shares. I'm guessing that the editors of the Times hope that this salient graph will make New Yorkers feel guilty that Portland and San Francisco have made greater progress on embracing the bike while New Yorkers stay on the subway.
source
In a recent paper, I looked within cities and studied who bikes to work. See Table 5 of this paper. This table focuses on California. Kahn, Matthew E. & Eric A. Morris (2009). Walking the walk: New tests of environmentalism’s association with green travel behavior. Journal of the American Planning Association, 75(4), 389-405. (Refereed)
Those who live closer to the city center and live in "environmentalist communities" are most likely to commute by bike. There is a network externality here. If more people in the community want to commute by bike, the local Mayor has a greater incentive to supply infrastructure to support this choice. As the Mayor invests public funds in improving biking as a commuting mode, more "bike types" will move to this city and more incumbent commuters will choose to commute by bike.
So, this is really a commons issue of reallocating land away from other uses towards being "bike friendly". In China right now, the opposite trend is taking place. Public space that was used by bikes is now being grabbed by cars. Now , can't "we all get along"? This is an open question given that cars and bikes move at different speeds and that the laws of physics are well understood.
As the U.S population ages, will older Boomers in Berkeley travel by bike? Or will solar powered motorcycles be in demand?
source
In a recent paper, I looked within cities and studied who bikes to work. See Table 5 of this paper. This table focuses on California. Kahn, Matthew E. & Eric A. Morris (2009). Walking the walk: New tests of environmentalism’s association with green travel behavior. Journal of the American Planning Association, 75(4), 389-405. (Refereed)
Those who live closer to the city center and live in "environmentalist communities" are most likely to commute by bike. There is a network externality here. If more people in the community want to commute by bike, the local Mayor has a greater incentive to supply infrastructure to support this choice. As the Mayor invests public funds in improving biking as a commuting mode, more "bike types" will move to this city and more incumbent commuters will choose to commute by bike.
So, this is really a commons issue of reallocating land away from other uses towards being "bike friendly". In China right now, the opposite trend is taking place. Public space that was used by bikes is now being grabbed by cars. Now , can't "we all get along"? This is an open question given that cars and bikes move at different speeds and that the laws of physics are well understood.
As the U.S population ages, will older Boomers in Berkeley travel by bike? Or will solar powered motorcycles be in demand?
posted by Matthew Kahn at 7:59 AM
4 Comments:
Is that the percentage of all trips to work that are by bicycle, or the percentage of workers who frequently bike?
I think electric assist bikes might see a jump in popularity as people get older. Also, maybe folding bikes, because they give you the option to shorten the riding time on any trip by using public transportation or a car.
Online adultpornomovies Teen Home free hardsexporn watch and tube pornmovieswatch tv. for amateur germansexmovie sites. Good pornmovietube watch !
Good post,really cars are getting increase in quantity and taking place of bikes.people want to move fastly so they taking intered-st in cars instead of bikes.
........................
Cheap Flights to Santiago Chile
Post a Comment
<< Home