Question 851564
Acceleration means, rate of change of velocity and so acceleration multiplied by time gives velocity.  In this problem, speed can be used.  Still using RT=D, rate, time, distance, the units are meters and seconds.


______________rate__________time_________distance
CAR___________2*t___________t____________{{{2t^2}}}
TRUCK_________9.5___________t____________{{{9.5t}}}


That data table should be understandable enoough.
When do these vehicles reach the same distance in the same direction from the signal?

{{{2t^2=9.5t}}};
Solve for t and then find distance.  Do NOT try to divide by t to solve for it!