Do longer combination vehicles rules differ by state?

Yes. May you run western doubles, Rocky Mountain doubles, or triples here? Crosstatelaws maps all 50 states for travelers who are physically in that state — not for what a state requires of its own plates or licenses.

Does longer combination vehicles apply if my vehicle is registered in another state?

Operate-here rules (speed, helmets, possession, inspections you must stop for) follow the state you are in. Registration-state rules such as a front license plate do not. Read the layer notes on the map.

Where can I see a longer combination vehicles map?

Open the Crosstatelaws interactive map with this layer soloed: https://crosstatelaws.com/?solo=lcv

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Longer combination vehicles laws by state

People search “Longer combination vehicles by state”, “Longer combination vehicles laws by state”, and “Doubles / triples map” when a road trip, boat, bike, or load is about to cross a line. This page is the 50-state index for longer combination vehicles. Colors and quotes are written for someone in that state today, not for what that state demands of its own registered vehicles.

Open the Doubles / triples difference map

How states differ

May you run western doubles, Rocky Mountain doubles, or triples here?.

Triples and/or Rocky Mountain / turnpike doubles on designated routes
Western doubles (28s) on designated routes; no triples
No LCV program — typical 53-ft single or STAA doubles only

Searches this page is meant to answer

If you typed any of these — or a close variant with a state name — this is the Crosstatelaws topic that should show up:

Longer combination vehicles by state
Longer combination vehicles laws by state
Doubles / triples laws by state
Longer combination vehicles map
Longer combination vehicles traveling across state lines
does longer combination vehicles change by state
are triple trailers legal
western doubles states
LCV states map
Longer combination vehicles in California / Texas / Florida / New York
is longer combination vehicles legal while traveling

All 50 states

One-line traveler summary for each state. Open the map for the quoted rule and footnotes.

Alabama (AL): Alabama: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Alabama (no LCV program)).
Alaska (AK): Alaska: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Alaska (no LCV program)).
Arizona (AZ): Arizona: STAA 28-ft western doubles on the National Network; no triples (A.R.S. § 28-1093 / ADOT).
Arkansas (AR): Arkansas: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Arkansas (no LCV program)).
California (CA): California: STAA 28-ft doubles on the designated network; no triples (Cal. Veh. Code § 35401 / Caltrans STAA).
Colorado (CO): Colorado: STAA 28-ft doubles on the designated network; no triples (C.R.S. § 42-4-503 / CDOT).
Connecticut (CT): Connecticut: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Connecticut (no LCV program)).
Delaware (DE): Delaware: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Delaware (no LCV program)).
Florida (FL): Florida: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Florida (no LCV program)).
Georgia (GA): Georgia: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Georgia (no LCV program)).
Hawaii (HI): Hawaii: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Hawaii (no LCV program)).
Idaho (ID): Idaho: triples and Rocky Mountain doubles on designated ITD routes (Idaho Code § 49-1010 / ITD LCV). Endorsements, designated routes, and a permit still apply.
Illinois (IL): Illinois: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (625 ILCS 5/15-107).
Indiana (IN): Indiana: Indiana Toll Road doubles and triples on the designated turnpike (Ind. Code § 9-20-3 / INDOT Toll Road LCV). Endorsements, designated routes, and a permit still apply.
Iowa (IA): Iowa: STAA 28-ft doubles on the designated network; no triples (Iowa Code § 321.457 / Iowa DOT).
Kansas (KS): Kansas: triples and Rocky Mountain doubles on designated KDOT routes (Kan. Stat. § 8-1904 / KDOT LCV). Endorsements, designated routes, and a permit still apply.
Kentucky (KY): Kentucky: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Kentucky (no LCV program)).
Louisiana (LA): Louisiana: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Louisiana (no LCV program)).
Maine (ME): Maine: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Maine (no LCV program)).
Maryland (MD): Maryland: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Maryland (no LCV program)).
Massachusetts (MA): Massachusetts: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Massachusetts (no LCV program)).
Michigan (MI): Michigan: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Michigan (no LCV program)).
Minnesota (MN): Minnesota: STAA 28-ft doubles on the designated network; no triples (Minn. Stat. § 169.81 / MnDOT).
Mississippi (MS): Mississippi: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Mississippi (no LCV program)).
Missouri (MO): Missouri: STAA 28-ft doubles on the designated network; no triples (Mo. Rev. Stat. § 304.170 / MoDOT).
Montana (MT): Montana: triples and Rocky Mountain doubles on designated MDT routes (Mont. Code § 61-10-124 / MDT LCV). Endorsements, designated routes, and a permit still apply.
Nebraska (NE): Nebraska: STAA 28-ft doubles on the designated network; no triples (Neb. Rev. Stat. § 60-6,290 / NDOT).
Nevada (NV): Nevada: triples and Rocky Mountain doubles on designated NDOT routes (NRS 484D.700 / NDOT LCV). Endorsements, designated routes, and a permit still apply.
New Hampshire (NH): New Hampshire: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (New Hampshire (no LCV program)).
New Jersey (NJ): New Jersey: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (New Jersey (no LCV program)).
New Mexico (NM): New Mexico: STAA 28-ft doubles on the designated network; no triples (N.M. Stat. § 66-7-404 / NMDOT).
New York (NY): New York: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (New York (no LCV program)).
North Carolina (NC): North Carolina: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (North Carolina (no LCV program)).
North Dakota (ND): North Dakota: triples and Rocky Mountain doubles on designated NDDOT routes (N.D. Cent. Code § 39-12-04 / NDDOT LCV). Endorsements, designated routes, and a permit still apply.
Ohio (OH): Ohio: Ohio Turnpike doubles and triples on the designated turnpike (Ohio Rev. Code § 5577.05 / Ohio Turnpike LCV). Endorsements, designated routes, and a permit still apply.
Oklahoma (OK): Oklahoma: triples and turnpike doubles on designated ODOT / turnpike routes (47 O.S. § 14-103 / ODOT LCV). Endorsements, designated routes, and a permit still apply.
Oregon (OR): Oregon: triples and Rocky Mountain doubles on designated ODOT routes (Or. Rev. Stat. § 818.200 / ODOT LCV). Endorsements, designated routes, and a permit still apply.
Pennsylvania (PA): Pennsylvania: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Pennsylvania (no LCV program)).
Rhode Island (RI): Rhode Island: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Rhode Island (no LCV program)).
South Carolina (SC): South Carolina: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (South Carolina (no LCV program)).
South Dakota (SD): South Dakota: triples and Rocky Mountain doubles on designated SDDOT routes (S.D. Codified Laws § 32-22-42 / SDDOT LCV). Endorsements, designated routes, and a permit still apply.
Tennessee (TN): Tennessee: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Tennessee (no LCV program)).
Texas (TX): Texas: STAA 28-ft doubles on the designated network; no triples (Tex. Transp. Code § 622.902 / TxDOT).
Utah (UT): Utah: triples and Rocky Mountain doubles on designated UDOT routes (Utah Code § 72-7-402 / UDOT LCV). Endorsements, designated routes, and a permit still apply.
Vermont (VT): Vermont: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Vermont (no LCV program)).
Virginia (VA): Virginia: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Virginia (no LCV program)).
Washington (WA): Washington: triples and Rocky Mountain doubles on designated WSDOT routes (RCW 46.44.037 / WSDOT LCV). Endorsements, designated routes, and a permit still apply.
West Virginia (WV): West Virginia: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (West Virginia (no LCV program)).
Wisconsin (WI): Wisconsin: no triples / Rocky Mountain doubles; 53-ft single or STAA 28-ft doubles on the designated network (Wisconsin (no LCV program)).
Wyoming (WY): Wyoming: triples and Rocky Mountain doubles on designated WYDOT routes (Wyo. Stat. § 31-18-802 / WYDOT LCV). Endorsements, designated routes, and a permit still apply.

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Not legal advice. Confirm statutes before you travel. Disclaimer.