Two cars are driving at the same speed. What is true about the lines that represent the distance traveled by each car at a given time?

The cars are in the same
speed.

Speed indicates oly
magnitude.

The lines the car travel are not
indicated.

The cars may travel in the same line and
direction . Then they keep the same distance between
them.

The cars may travel in opposite direction in the same
speed. They meet exactly half the way at a time , half inital the initial distance
divided by the speed.

If the cars travel in different 
lines paralel to each other, then  the situation similar as
above.

If the cars travel at different lines(not parallel)
, then the  directions of their speed , the angle of inclination between the path of the
lines the cars move are to be considered  and the n only we can say  about the relative
distance of the cars on different lines.