sidewalks vs. ramps

[Alshaboti]

English Grammar Tests, Elementary Level

ESL/EFL Test #129 "Real Life: Transportation (2)", question 5

Pedestrians should walk on ......... whenever possible. This is better and safer than walking on the busy roadways.

(a) highways
(b) sidewalks
(c) ramps
(d) boards

English Grammar Tests, Elementary Level

ESL/EFL Test #129 "Real Life: Transportation (2)", answer 5

Pedestrians should walk on sidewalks whenever possible. This is better and safer than walking on the busy roadways.

Correct answer: (b) sidewalks

Your answer was: incorrect
Pedestrians should walk on ramps whenever possible. This is better and safer than walking on the busy roadways.
_________________________

I think ramps also possible, right?

[Beeesneees]

No.
A ramp is not as safe as a walkway/pavement.
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Cheers m' dears!