TheEdge said the following in another Forum thread about our "Rediculous (sic) Traffic" - http://www.usj.com.my/bulletin/uploa...2612#post12612
I find that a lot of people are of the opinion that roundabouts are sources of bad traffic jams. However, this problem is purely due to the design of the roundabout's access roads and the mentality of the drivers on the road.The reason for the jams in Subang Jaya is probably the roundabout. Eversince they widened the roads leading to it, the volume of traffic has
increased while the roundabout is still 2 laned. I would suggest demolishing them and cover up the moonsoon drains so we could install "intelligent traffic lights" to smoothen the traffic flow. The roundabouts has been a bottle-neck for traffic from USJ and also Sunway for a long time.
There are simple rules for drivers to follow - the most important being to allow RIGHT-OF-WAY to drivers coming from the right. Once this rule is followed, the roundabouts were shown to be able to handle higher volumes of traffic than traffic lights. It is saddening to note that our locals fight for every inch of space. This senseless "kia-su" attitude is the main cause of traffic jams. I hope you folks are aware of the little patterns on the roads in Taipan - they are actually meant to be mini-roundabouts. If road users followed the basic rule of right-of-way, I don't see why they cannot be useful.
Take a look at the following website at Drivers.com -
Below are a few highlights from that website -
According to the Turner-Fairbank Highway Research Center (TFHRC), the era of modern roundabouts began in the United Kingdom in 1956 with the construction of the first "yield-at-entry" roundabouts. In 1966, a nationwide yield-at-entry rule launched the modern roundabout revolution. Australia and most other British-influenced countries soon built modern roundabouts.
"Yield-at-entry is the most important operational element of a modern roundabout," says the center, "but it is not the only one."
"The physical configuration of a modern roundabout, with a deflected entry and yield-at-entry, forces a driver to reduce speed during the approach, entry, and movement within the roundabout," the center says.
This is contrary to an intersection where many drivers are encouraged by a green or yellow light to accelerate to get across the intersection quickly and to 'beat the red light'