Michigan: permisos de carga sobredimensionada

Confianza de los datos: Medium. No pudimos corroborar por completo cada cifra de esta página con una fuente oficial primaria. Considérelas un punto de partida y confírmelas con la oficina de permisos antes de planificar un traslado.
Legal dimensions (T-1), travel/weekend/holiday (T-2 + official MDOT FAQ), superload limits (T-2), portal/phone from official MDOT documents. Escort dimension thresholds NULLED because they are NOT in MDOT's official T-1/T-2 (only equipment specs are) - do not publish unofficial numbers as fact; escort_notes carries the caution. NOTE: legal_max_gross_lbs=80000 is the federal/bridge-formula figure; Michigan uniquely allows higher legal gross on state trunklines via axle count (up to ~164,000 lbs on 11 axles). Width 102 designated highways (96 non-designated); length 65 truck+semitrailer designated (semitrailer alone 53).

Dimensiones máximas legales (sin permiso)

Ancho

8ft (96in)

Altura

13.5ft (162in)

Longitud máxima del semirremolque

53ft en rutas designadas · 50ft en el resto

Longitud máxima de vehículo de una sola unidad

40ft

Peso bruto

80,000 lbs

Eje sencillo

18,000 lbs

Eje tándem

32,000 lbs

MCL 257.717: the total outside width of a vehicle or load shall not exceed 96 in (8 ft). ⚠️ 102 in (8 ft 6 in) applies ONLY on DESIGNATED highways (MDOT T-1) — the figure shown is the one that holds on every Michigan highway. Michigan cannot be expressed as a single width: check the MDOT Truck Operators Map for which highways are designated before planning above 96 in. The same designated/non-designated split governs semitrailer LENGTH here (53 ft designated / 50 ft non-designated).

Fuente oficial de este límite de anchura →

MCL 257.722 sets AXLE weight limits, not a gross cap — Michigan gross weight is whatever the axle count, spacing and function allow under the state axle-spacing formula (the "Michigan Bridge Formula"). ⚠️ On non-Interstate state highways this permits a normal legal gross of UP TO 164,000 lb for the 11-axle tractor-semitrailer-trailer configuration Michigan allows (axles have been capped at eleven since 1967) — the highest legal gross in North America, and available WITHOUT an overweight permit. On the INTERSTATE system the federal 80,000 lb limit still applies. The 80,000 lb figure shown is the conservative one that holds everywhere; 164,000 lb requires the full 11-axle configuration and compliance with the spacing formula, so confirm your exact configuration with MDOT before loading above 80,000 lb.

MCL 257.719: a vehicle unloaded or with load shall not exceed a height of 13 ft 6 in (162 in). ⚠️ The owner of a vehicle that collides with a lawfully established bridge or viaduct is liable for ALL damage and injury resulting from a collision caused by the height of the vehicle. (Note: MCL 257.717 is the WIDTH section — a common mix-up.)

Fuente oficial de este límite de altura →

MDOT T-1 (rev. 05/2024): "Length of combination of truck-tractor and semitrailer with or without load ... NO LIMITATION (provided semitrailer lengths do not exceed limits for non-designated and designated highways)." Semitrailer including load: 53 ft on DESIGNATED highways, 50 ft on NON-DESIGNATED. "Length of semitrailers longer than 50 feet shall operate on designated highways only." Any other single vehicle: 40 ft. ⚠️ OUR PREVIOUS 65 FT WAS WRONG IN THE MOST DANGEROUS WAY: 65 ft is the "truck and semitrailer" figure — a STRAIGHT TRUCK pulling a semitrailer — on designated highways only, and is also the 3-unit combination limit. It is neither the semitrailer limit nor the tractor-semitrailer limit. Two failures followed: (1) Michigan sets NO overall limit at all for truck-tractor + semitrailer, so 65 under-reported it; (2) the number that actually governs is the SEMITRAILER, so a carrier trusting 65 could run a 53 ft trailer onto a non-designated highway where 50 ft is the ceiling. Michigan cannot be represented by one number — check the MDOT Truck Operators Map for which highways are designated. Width also differs by class (96 in vs 102 in). Michigan's single-axle limit of 18,000 lb is separately lower than federal.

Fuente oficial de estos límites de longitud →

Umbrales de escolta / vehículo piloto (consulta el glosario para los términos, los requisitos de certificación para el conductor)

Esta jurisdicción no publica umbrales de escolta a nivel estatal: los requisitos se establecen como condiciones en cada permiso individual. Las cifras siguientes son la mejor indicación disponible de fuentes secundarias, no el reglamento. Debe confirmarlas con la oficina de permisos antes de despachar.

Escolta delantera requerida por encima de

12ft de ancho

Escolta trasera requerida por encima de

12ft de ancho

Ambas escoltas requeridas por encima de

14ft de ancho

Escolta de altura requerida por encima de

14ft de alto

CAUTION - Michigan escort dimension thresholds are NOT published in MDOT's official T-1/T-2 guides (which give only escort-vehicle equipment specs: passenger vehicle, amber light visible 500 ft, 5'x12" OVERSIZE LOAD sign). Verify escort requirements on each permit's special-provisions sheet with the MDOT Transport Permit Office. Widely-reported (unofficial) thresholds for reference only: rear escort ~over 12' wide; front and rear ~over 14' wide; front height-sensing escort ~over 14'6" high; overlength 90-100' one escort, over 100' two.

Restricciones de circulación

Circulación nocturna

Generalmente restringida

Circulación en fin de semana

Generalmente permitida

Circulación en domingo

Generalmente permitida

Per MDOT T-2 and the MDOT OSOW FAQ: permits are issued for daylight hours only (1/2 hr before sunrise to 1/2 hr after sunset), Monday-Friday. Weekend movement is allowed ONLY for loads not exceeding 10' wide, 14' high, and 90' long - all day Saturday and until 3 p.m. Sunday; mobile/modular homes are NOT eligible for weekend movement. No overweight permits are issued during the spring thaw weight-restriction period, and no permits over 14' wide during spring restrictions.

Bloqueos por festivos: No movement from noon the day preceding until daylight the first day after: New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day. When a holiday falls on Friday or Monday, the blackout covers the whole three-day weekend.

Ve cómo se compara Michigan con cada estado ›

Umbrales de supercarga

Ancho superior a

16ft

Altura superior a

15ft

Longitud superior a

150ft

Per MDOT T-2: single-trip permits are not issued above 16' wide (192 in), 15' high (180 in), or 150' overall length. Loads exceeding these are handled as superloads requiring special consideration - written justification, MiTRIP application, and Route Survey Certification (Form 2465) submitted to the Lansing Transport Permit Office at least 10 working days ahead. No fixed superload weight; extended-permit gross generally capped at 150,000 lbs.

Costo estimado del permiso Verifica antes de confiar

$15 oversize-only / $50 overweight

⚠ Statute includes a CPI-escalation clause — the actual current fee may run above the listed figure.

Fuente: MCL 257.725 — verifica la tarifa vigente con la oficina de permisos antes de presupuestar un traslado.

Solo la tarifa del permiso — no incluye los costos del servicio de escolta/vehículo piloto (a precio de mercado, contratados por separado) ni las tarifas de servicios de permisos de terceros. Es una estimación con fines de planificación, no una cotización.

Obtener un permiso

Portal en línea

https://www.michigan.gov/mdot/business/permits/oversize-overweight

Teléfono

517-241-8999

Michigan single axle limit 18,000 lbs (lower than federal). Spring weight restrictions common statewide.

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