Now I am using Tractor-Trailers for comparison, in Ohio a Triple trailer, A Tractor and three trailers can be as long as 115 feet and weigh up to 114,000 pounds. The Indiana East-west Turnpike has similar "restrictions": Please note, none of the triples and doubles permitted TODAY on the interstate have anything like the computer program to keep the wheels directly behind the wheels ahead. i.e. Each trailer will turn inside the previous trailer. This what makes such long combinations Vehicle (LCV) so dangerous. Thus I am using the dimension of this "Triple" for comparison only. On the other hand, given its computer program control wheels, a five to ten "Vehicle" length would NOT be impossible, in fact perfectly usable on interstates, getting off and back on at every intersection.
http://www.ohioturnpike.org/media/pdf/PROVISIONS-TRIPLES_05-01-07_.pdf
http://www.fhwa.dot.gov/policy/otps/110721/sec3.htm
Here is a PDF report from the early 1990s on tractor trailers use in the US including Triple trailers, Ohio had a 95 Foot and a 115,000 weight limit at that time period. Today, 2012 it is 115 feet.
http://www.fhwa.dot.gov/reports/tswstudy/Vol2-Chapter3.pdf
Alberta Canada has 125 feet limit with a weight limit of 138,000 pounds.:
http://www.highwaysafetyroundtable.ca/member/documents/RAC%20Heavy%20Truck%2003.pdf
Today, Triples are permitted in the following states:
Alaska, Arizona, Colorado, Florida, Idaho, Indiana, Iowa, Kansas, Massachusetts, Michigan, Missouri, Montana, Nebraska, Nevada, New York, North Dakota, Ohio, Oklahoma, Oregon, South Dakota, Utah, Washington, and Wyoming.
http://www.dot.ca.gov/hq/traffops/trucks/exemptions/lcvs.htm