Corner speed ADVISORY (not compulsory) speed signs are generally set so that the at the advised speed there is 0.2g sideways. Different vehicles respond differently to sideways G's (obviously) but using this method the corner advisory speed signs should be consistent for similar corner speeds.
I'm a Engineer and what I find interesting (worrying) about this is that in the Gizy herald there are these three points
Loss of control was generally a factor, as well as driving too fast for the conditions, poor observation, handling judgement and fatigue.
(too fast for the conditions is another way of saying loss of control)
Areas with asphalt and low skid resistance had been resurfaced with chip seal and rest areas were improved.
and
The statistics showed a significant drop in accidents for 2005 and Mayor Meng Foon and Bill Burdett both asked if a reduced speed limit was necessary in light of the improved figures.
Mr Govender said crashes often hit a lull for a while after road improvements, but Transit preferred to look at trends rather than on a one off year.
I'm assuming that the chip seal was laid before 2005 in the following.
These points i.e. loss of control is a primary factor, areas of asphalt that have been chipsealed (skid resistance improved) and a drop in crashes since the chipseal has been laid.
I would seriously suggest that the skid resistance of the surfacing is a far more important factor than human error. They should be improving the skid resistance of a number of the key corners, not doing anything for 3 to 5 years , reassessing the crash rates and then if necessary looking at other measures.
Cheers R
"The ultimate result of shielding men from the effects of folly is to fill the world with fools." - Herbert Spencer, English Philosopher (1820-1903)
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