1:3 is the ratio because if 1/4 are green then 3/4 are orange
2.5 still if you make it a fraction it would be 2 and 1 1/2 so you can't simplify that any more
Road because you want to turn into the lane that is by the curb
Answer:
From first Newton's equation of motion:

Substitute the variables:

Acceleration is 2 ms-²