If you build bigger roads, they inevitably fill up with more cars because drivers gravitate to bigger roads, which then slows down traffic.
The paradox is actually stated "the equilibrium speed of car traffic on a road network is determined by the average door-to-door speed of equivalent journeys taken by public transport" but what it means is that building bigger roads only fills them up with more cars that are happy to use the faster road, until the new road is so busy that public transport becomes a better alternative again, and then a certain number of drivers shift to public transport, restoring equilibrium.
The paradox is actually stated "the equilibrium speed of car traffic on a road network is determined by the average door-to-door speed of equivalent journeys taken by public transport" but what it means is that building bigger roads only fills them up with more cars that are happy to use the faster road, until the new road is so busy that public transport becomes a better alternative again, and then a certain number of drivers shift to public transport, restoring equilibrium.
Also, explained graphically at 3:24 in this video
No comments:
Post a Comment