"Road Movement" question

[Soldier]

Yes, you can place them side by side. Even better if you stager them, say 5 to 10m intervals back, etc.
Make sure you place the center of each vehicle just on the edge of the road, left and right. Just where the soft shoulder meets the pavement. This assures enough space between the two columns, so vehicles can pas by each other, without colliding.
One more thing, very important. Check the top speed of all your vehicles that will participate in your two columns. Fastest vehicles lead each column and so on down the line..
After your first minute movie/orders sometimes you may have to make an adjustment or two. Some vehicles may collide, being slowed down by turns. After that, it's smooth sailing.. :-)