what are those black lines in the middle of the road?

Question

especially in highways where cars go faster, and where there are little dips in the road. it looks like a large, very long and even oil patch but i have trouble thinking that this is caused by vehicle drippings. most visible on aerial shots of highways.

NOT the paint marks. the line that's like two feet wide and it looks dirty. notice the part where the tires meet contact with the road is "cleaner" and the middle part, under the car itself, it's darker and it's not because of intentional coloring by the government.

Answer 1

Those lines are from fluid leaks and spillings of ychh from cars, trucks, semi's, boats, motor homes etc... (Yes I said boats- on trailers).

Not every vehicle on the road is leak free, and over time, those spots of oil, antifreeze, brake fluid, windshield washer fluid, gas, diesel, garbage truck juice, and muck builds up and makes a dirty black line down the road.

Answer 2

Personally, I think that it is lines of tar. Tar that is leaking from a road-repair vehicle. They've been fixing potholes, whathaveyou, and the leak makes a very distinct wavy line on the road.

Answer 3

Crap that leaked out of the hundreds of cars traveling over the same road.

Answer 4

Patches to fill in the cracks which have formed on the road.

Answer 5

It's how "big brother" keeps track of traffic flow patterns. Keep watching the skies!!!

Answer 6

Probably someone in a semi or other vehicle slamming on their brakes????????????Vehicle droppings???lol

Answer 7

Omg, I must be colourblind.
I've always thought they were white.


:S

Answer 8

even i donno..temme...mann

Answer 9

dnt knw :(