The article refers to the northbound Zhuozhou Toll Gate at the G4 motorway just south of the Beijing city boundary.
As you can see on the aerial photography from Google Maps, at this location, the G4 motorway has 8 lanes (4 in each direction):
Heavier cars are safer than light cars. Larger cars are safer than small cars. This applies to SUV's as well especially since rollover is not a factor in late model SUV's with standard stability control. Crash rates from both types of vehicles are similar, with the heavier/bigger vehicle having a major safety advantage.
From the IIHS Status Report, Special ...
I know this is long since solved, but I was looking into it a bit.
If you consider an overhead image of the area that was jammed:
You can see that there is far more than 1 car per lane in the plaza. In fact I'm counting 50 cars across which may be where that number came ...
Maybe there's a basis, but if so, it doesn't come from official statistics.
From the CIA World Factbook on roadways, the United States (#1) and China (#3) have 7,758,605 km of paved roads in their official road networks.
total: 6,586,610 km
country comparison to the world: 1
paved: 4,304,715 km (includes 76,334 km of expressways)
The numbering system is sequential. It is not a measurement system for land area. The scheme requires that I-80 is farther north than I-10, I-20, and so on. But it does not prescribe that I-80 be a specific distance north of I-10 for land-area-measurement.
Interstates are very roughly evenly spaced because of the places they connect.
The federal ...
Obviously, my source is looking at headlights. However if one has internet access you can look it up. Wikipedia seemed to have the most info in one spot but additional info at other sites would be helpful . Lumens (L) are a measure of the amount of light.
Old sealbeams = ?,
early halogens = 1550 L
later halogens =1820 L
newest halogens = 2100 L
HID = ...