Many small roads do not have painted markings along

[700+]

The problem was posted in the wrong forum.
http://www.manhattangmat.com/forums/painted-marking-along-their-edge-t12019.html

Many small roads do not have painted markings along their edges. Clear edge markings would make it easier for drivers to see upcoming curves and to judge the car's position on the road, particularly when visibility is poor, and would therefore seem to be a useful contribution to road safety. However, after Greatwater County painted edge markings on all its narrow, winding roads, the annual accident rate along those roads actually increased slightly. Which of the following, if true, most helps to explain the increase in accident rate?
A. Greatwater County has an unusually high proportion of narrow, winding roads.
B. In bad weather it can be nearly as difficult for drivers to see the road as it is at night.
C. Prior to the painting of the edge markings, Greatwater County's narrow, winding roads already had a somewhat higher accident rate than other Greatwater County roads.
D. Many of the accidents on narrow, winding roads involve a single vehicle veering off the road, rather than the
collision of two vehicles.
E. After the markings were painted on the roads, many drivers who had gone out of their way to avoid driving on those roads at night no longer did so.

[das.sk.82]

The problem was posted in the wrong forum.
http://www.manhattangmat.com/forums/painted-marking-along-their-edge-t12019.html

Many small roads do not have painted markings along their edges. Clear edge markings would make it easier for drivers to see upcoming curves and to judge the car's position on the road, particularly when visibility is poor, and would therefore seem to be a useful contribution to road safety. However, after Greatwater County painted edge markings on all its narrow, winding roads, the annual accident rate along those roads actually increased slightly. Which of the following, if true, most helps to explain the increase in accident rate?
A. Greatwater County has an unusually high proportion of narrow, winding roads.
B. In bad weather it can be nearly as difficult for drivers to see the road as it is at night.
C. Prior to the painting of the edge markings, Greatwater County's narrow, winding roads already had a somewhat higher accident rate than other Greatwater County roads.
D. Many of the accidents on narrow, winding roads involve a single vehicle veering off the road, rather than the
collision of two vehicles.
E. After the markings were painted on the roads, many drivers who had gone out of their way to avoid driving on those roads at night no longer did so.

E appears to be most suitable explanation of increased accident rates after the roads were painted.

[RonPurewal]

to the original poster: do you have a specific question about this problem?

please don't just post a problem; in that case, we don't know what to explain or where to focus.
when you post a problem, please ask at least one specific question, and/or indicate the answer choices between which you are having trouble choosing. thanks.

[subhajeetcool]

Hi Ron,

Can you please let me know why option D in the above question is incorrect.

[RonPurewal]

Hi Ron,

Can you please let me know why option D in the above question is incorrect.

choice (d) is actually the worst kind of situation you can have: that answer choice actually magnifies the discrepancy rather than helping to resolve it. in other words, given the information in choice (d), the statements in the passage are even more problematic than they were in the first place.

remember what you're looking for here: you need a possible explanation for the fact that accidents increased once edge markings were painted on the roads.
given choice (d), this is even harder to explain -- because the sort of one-car accidents described in choice (d) are exactly the kind of accidents that should be reduced by the painting of clear edge markings on the road.
not good.

[fionaw752]

Hi Ron,

Sorry for bumping this thread.
I have a question: although I can choose E by eliminating the other four options, but I cannot follow the logic about this question, does choice E tell us that the drivers no longer went out of their way so the increased accidents are caused by car collisions?
I try not to overthink when approach CR problems, apparently it is not good enough, because I think choice E just tells us the drivers no longer went out of road, but why does it mean the car accidents increase?

many thank you for your kind reply and help!

[RonPurewal]

there's another (longer) thread on this problem here

https://www.manhattanprep.com/gmat/foru ... 31500.html

please re-post your question on that thread. thank you.