This Borg-like 3-D printer takes an 8-foot step forward every 12 minutes leaving behind the highway of the future. This translates to about a mile a week or 50 miles a year.
The function of the printer is similar to that of an assembly line where the manufacturing process is accomplished as one continuous flow.
The printer is designed so that I can go around corners and navigate hills. The only reason why it is shown here perfectly straight is because of the difficulties involved with creating such a complicated drawing.
For urban installations the 3-D printer can step through the city with minimal disruption to traffic. When crossing sensitive natural environments, the mechanism can pass through with little or no damage save for the posts.