Great Truck Wall * China - Highway jam enters its 9th day, spans 100km
Trucks bound for Beijing stand virtually still on the Beijing-Tibet Expressway, formerly known as the Badaling Expressway

* China - Traffic Jam: An Expert on What It All Means

- Driver’s Seat: Do you see patterns in the Chinese traffic jam that are familiar? Could the same thing happen in the U.S.?
- Tom Vanderbilt: From what I can tell, this was something of a “perfect storm,” traffic-wise — you have a road under construction in a remote area that is experiencing a frenetic burst of economic activity. There are other cases that have been extreme —the last weekend in France in August, for example, when everyone’s returning from holiday, or the episode in Pennsylvania earlier this year when extreme icing stranded a huge number of drivers for a dozen hours... But we should also remember the ‘non-linear nature’ of traffic: One stalled vehicle on a two-lane road can cut the entire capacity in half, because of the bottleneck. It doesn’t take much to start a jam, and it takes longer for drivers to emerge from it than it takes them to get into it... But I saw a comment from a truck driver that was telling: “Everybody has to use this road as the other is too expensive, it should be free.” That’s the root of the problem here. When a scarce good is under-priced, we trade the savings in money for costs in time — more people will queue for it. The other road may be overpriced, but I can guarantee that no traffic problem has ever been solved by making a crowded road free...
- DS: What steps can we in the US take to solve ours?
- TV: I’ve seen all kinds of novel attempts to combat congestion worldwide; I’ve just returned from Bogota, Colombia, where a major two-way street becomes one-way on the stroke of five to accommodate the outflow of the evening rush, and cars with certain numbered license plates are not allowed in the city on certain days... The future, I think, lies in what’s called “ITS,” for intelligent transportation systems — everything from sensors that detect slowing traffic and set new speed limits to avoid severe traffic “shockwaves,” to real-time pricing based on the current occupancy of the road. We can’t reasonably build our way of traffic, but we can think — and pay — our way out... (Photo from Getty Images: Truckers wait for a break in the days-long traffic jam near Beijing)
* China - Ports gain prominence in recession

* USA - The Inconvenient Truth About Traffic Math: Progress Is Slow. "there is absolutely no way congestion can stop increasing"

Labels: roads congestion
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