MO
Missouri oversize permit rules
What Missouri charges for a single-trip OS/OW permit, the limits that trigger one, and the escort thresholds — read from the state’s own publication. This rule has been in effect since 2025-03-31; we last read the source on 2026-07-12.
Oversize permit
$15
One price for a single-trip permit, whatever the dimensions. A 9-foot-wide load and a 16-foot-wide load pay the same.
Overweight permit
From $15
Scales with weight — there is no single figure.
A load that is both oversize and overweight pays this fee only, not both.
+ $20 Permigo service fee per permit, state fees at cost.
Legal limits
Exceed any one of these in Missouri and you need a permit for this state.
| Limit | Interstate | Off-interstate |
|---|---|---|
| Width | 8'6" | 8'6" |
| Height | 14'0" | 13'6" |
| Length | 60'0" | 60'0" |
| Gross weight | 80,000 lbs | 80,000 lbs |
| Single axle | 20,000 lbs | |
| Tandem axle | 34,000 lbs | |
| Trailer length | 53'0" |
What the permit costs
Missouri prices a single-trip permit as flat rate. One price for a single-trip permit, whatever the dimensions. A 9-foot-wide load and a 16-foot-wide load pay the same.
Escort requirements
Thresholds by road class. Where two classes differ, the road you are actually on governs.
Interstate / divided (4+ lane)
| Width | Requirement |
|---|---|
| Over 12'6" | 1 rear escortOver 12'6" to 14' wide: rear escort (divided highways) — Reg Book verbatim: 'Loads exceeding 12'6" but not exceeding 14' require a front escort on two-lane highways. A rear escort is required on divided and undivided highways.' (The old 12'4" divided onset was a)Statewide non-divided curfew: loads over 12'6" (to 16') wide may not move Mon–Fri 6:30–9:00 a.m. and 3:30–6:00 p.m. on ALL non-divided routes (7 CSR 10-25.020(13)(A)2/(15)(F)2 — previously)Metro curfews (M–F): St. Louis City/County + St. Charles/Jefferson County segments 6:30–9:00 & 3:30–6:30; Kansas City (Routes 150/291/I-470/152/I-435 box) and Springfield 7:00–9:00 & 4:00–6:00 (I-44/US-60 PM-only; US-65 both). Overweight-ONLY loads are exempt from metro curfews (CSR (9)(E)). |
| Over 14'0" | 1 rear escortOver 14' to 16' wide: front + rear on two-lane AND undivided-multilane; rear-only on divided (Reg Book verbatim). No movement on two-lane highways when dirt shoulders are wet (CSR (14)(C)1). |
| Over 16'0" | 1 front escort + 1 rear escort · route survey · superloadOver 16' wide: front + rear on ALL highways + an additional front on two-lane (Reg Book). Dimensional SUPERLOAD: $250 movement-feasibility fee ($265 total OS), ~2-week route evaluation, route survey, $2M insurance. Base rule adds MSHP on two-lane at >16' — suspended by the pilot. 2026 PILOT (modot.org Important Notices, eff. Jan 1 2026, monitored through CY2026): MSHP escort thresholds raised to >18' width (any highway), >200' length, >18' height — the base-rule triggers (16' two-lane width / 150' length / 17' height) return 2027-01-01 unless extended. RE-VERIFY IN JANUARY 2027. |
| Over 18'0" | 1 front escort + 1 rear escort · 1 police escortOver 18' wide: front + rear + MSHP law-enforcement escort on all highways; additional front on two-lane (Reg Book + the 2026 pilot threshold). MSHP escorts are arranged during permitting, dates/times set by MSHP, reimbursed by the carrier — non-reimbursement revokes ALL future permitting authority (CSR (15)(H)). |
| Height | Requirement |
|---|---|
| Over 15'6" | 1 front escort · height poleOver 15'6" high: ONE front height-detection vehicle on all highways — CSR (9)(G)3 verbatim: 'A height detection vehicle is required to precede overheight loads exceeding fifteen feet, six inches (15'6"). This vehicle satisfies any front escort requirement' |
| Over 16'0" | 1 front escort · height pole · route survey · superloadOver 16' high: dimensional SUPERLOAD ($250 feasibility fee; exactly 16' is still routine — 'in excess of') + an additional front escort on two-lane highways. |
| Over 17'0" | Conditions applyOver 17' high: written approval from every utility owner to disturb aerial lines (CSR (15)(C)). Base rule adds MSHP here — suspended by the pilot (>18' during CY2026). |
| Over 18'0" | 1 police escortOver 18' high: MSHP law-enforcement escort (the 2026 pilot threshold; base rule was >17'). 2026 PILOT (modot.org Important Notices, eff. Jan 1 2026, monitored through CY2026): MSHP escort thresholds raised to >18' width (any highway), >200' length, >18' height — the base-rule triggers (16' two-lane width / 150' length / 17' height) return 2027-01-01 unless extended. RE-VERIFY IN JANUARY 2027. |
| Length | Requirement |
|---|---|
| Over 125'0" | 1 rear escortOver 125' to 150': rear escort on ALL highways including divided (Reg Book verbatim). |
| Over 150'0" | 1 rear escort · route survey · superloadOver 150': rear escort on all highways + an additional front on two-lane; dimensional SUPERLOAD ($250 feasibility; route drive/geometric-model attestation required, CSR (3)(A)5). Base rule adds MSHP at >150' — suspended by the pilot (>200' during CY2026). |
| Over 200'0" | 1 police escortOver 200': MSHP law-enforcement escort (the 2026 pilot threshold). 2026 PILOT (modot.org Important Notices, eff. Jan 1 2026, monitored through CY2026): MSHP escort thresholds raised to >18' width (any highway), >200' length, >18' height — the base-rule triggers (16' two-lane width / 150' length / 17' height) return 2027-01-01 unless extended. RE-VERIFY IN JANUARY 2027. |
| Weight | Requirement |
|---|---|
| Over 160,000 lbs | route survey · superloadOver 160,000 lb: SUPERLOAD OW tier — the OW formula continues PLUS a bridge/roadway analysis fee: $425 (0–50 mi) / $625 (51–200) / $925 (>200) (7 CSR 10-25.020(4)(B)5, an ADD-ON,) |
| Over 220,000 lbs | Conditions applyOver 220,000 lb (to 350k): front escort on two-lane highways (Reg Book weight band — previously) |
| Over 350,000 lbs | 1 front escort + 1 rear escortOver 350,000 lb: front + rear escorts on ALL highways + an additional front on two-lane; an additional power unit is required (CSR (15)(D)); civilian escort cap: 3 for superload combinations (CSR (15)(G)). |
2-lane / undivided
| Width | Requirement |
|---|---|
| Over 12'6" | 1 front escortOver 12'6" to 14' wide: front escort on two-lane highways (undivided MULTILANE takes a rear instead — CSR (13)(B)) — Reg Book verbatim: 'Loads exceeding 12'6" but not exceeding 14' require a front escort on two-lane highways. A rear escort is required on divided and undivided highways.' (The old 12'4" divided onset was a)Statewide non-divided curfew: loads over 12'6" (to 16') wide may not move Mon–Fri 6:30–9:00 a.m. and 3:30–6:00 p.m. on ALL non-divided routes (7 CSR 10-25.020(13)(A)2/(15)(F)2 — previously)Metro curfews (M–F): St. Louis City/County + St. Charles/Jefferson County segments 6:30–9:00 & 3:30–6:30; Kansas City (Routes 150/291/I-470/152/I-435 box) and Springfield 7:00–9:00 & 4:00–6:00 (I-44/US-60 PM-only; US-65 both). Overweight-ONLY loads are exempt from metro curfews (CSR (9)(E)). |
| Over 14'0" | 1 front escort + 1 rear escortOver 14' to 16' wide: front + rear on two-lane AND undivided-multilane; rear-only on divided (Reg Book verbatim). No movement on two-lane highways when dirt shoulders are wet (CSR (14)(C)1). |
| Over 16'0" | 2 front escorts + 1 rear escort · route survey · superloadOver 16' wide: front + rear on ALL highways + an additional front on two-lane (Reg Book). Dimensional SUPERLOAD: $250 movement-feasibility fee ($265 total OS), ~2-week route evaluation, route survey, $2M insurance. Base rule adds MSHP on two-lane at >16' — suspended by the pilot. 2026 PILOT (modot.org Important Notices, eff. Jan 1 2026, monitored through CY2026): MSHP escort thresholds raised to >18' width (any highway), >200' length, >18' height — the base-rule triggers (16' two-lane width / 150' length / 17' height) return 2027-01-01 unless extended. RE-VERIFY IN JANUARY 2027. |
| Over 18'0" | 2 front escorts + 1 rear escort · 1 police escortOver 18' wide: front + rear + MSHP law-enforcement escort on all highways; additional front on two-lane (Reg Book + the 2026 pilot threshold). MSHP escorts are arranged during permitting, dates/times set by MSHP, reimbursed by the carrier — non-reimbursement revokes ALL future permitting authority (CSR (15)(H)). |
| Height | Requirement |
|---|---|
| Over 15'6" | 1 front escort · height poleOver 15'6" high: ONE front height-detection vehicle on all highways — CSR (9)(G)3 verbatim: 'A height detection vehicle is required to precede overheight loads exceeding fifteen feet, six inches (15'6"). This vehicle satisfies any front escort requirement' |
| Over 16'0" | 2 front escorts · height pole · route survey · superloadOver 16' high: dimensional SUPERLOAD ($250 feasibility fee; exactly 16' is still routine — 'in excess of') + an additional front escort on two-lane highways. |
| Over 17'0" | Conditions applyOver 17' high: written approval from every utility owner to disturb aerial lines (CSR (15)(C)). Base rule adds MSHP here — suspended by the pilot (>18' during CY2026). |
| Over 18'0" | 1 police escortOver 18' high: MSHP law-enforcement escort (the 2026 pilot threshold; base rule was >17'). 2026 PILOT (modot.org Important Notices, eff. Jan 1 2026, monitored through CY2026): MSHP escort thresholds raised to >18' width (any highway), >200' length, >18' height — the base-rule triggers (16' two-lane width / 150' length / 17' height) return 2027-01-01 unless extended. RE-VERIFY IN JANUARY 2027. |
| Length | Requirement |
|---|---|
| Over 110'0" | 1 rear escortOver 110' to 125': rear escort on all highways EXCEPT divided (Reg Book verbatim — the old 90' onset was)Tourist-area weekend bans (CSR (9)(D)): Lake of the Ozarks (Routes 5/42/Business 54 segments, May 25–Labor Day) and Branson (Routes 76/13 segments, May 1–Nov 30) — no Sat/Sun movement; binds overweight-only loads too. |
| Over 125'0" | 1 rear escortOver 125' to 150': rear escort on ALL highways including divided (Reg Book verbatim). |
| Over 150'0" | 1 front escort + 1 rear escort · route survey · superloadOver 150': rear escort on all highways + an additional front on two-lane; dimensional SUPERLOAD ($250 feasibility; route drive/geometric-model attestation required, CSR (3)(A)5). Base rule adds MSHP at >150' — suspended by the pilot (>200' during CY2026). |
| Over 200'0" | 1 police escortOver 200': MSHP law-enforcement escort (the 2026 pilot threshold). 2026 PILOT (modot.org Important Notices, eff. Jan 1 2026, monitored through CY2026): MSHP escort thresholds raised to >18' width (any highway), >200' length, >18' height — the base-rule triggers (16' two-lane width / 150' length / 17' height) return 2027-01-01 unless extended. RE-VERIFY IN JANUARY 2027. |
| Weight | Requirement |
|---|---|
| Over 160,000 lbs | route survey · superloadOver 160,000 lb: SUPERLOAD OW tier — the OW formula continues PLUS a bridge/roadway analysis fee: $425 (0–50 mi) / $625 (51–200) / $925 (>200) (7 CSR 10-25.020(4)(B)5, an ADD-ON,) |
| Over 220,000 lbs | 1 front escortOver 220,000 lb (to 350k): front escort on two-lane highways (Reg Book weight band — previously) |
| Over 350,000 lbs | 2 front escorts + 1 rear escortOver 350,000 lb: front + rear escorts on ALL highways + an additional front on two-lane; an additional power unit is required (CSR (15)(D)); civilian escort cap: 3 for superload combinations (CSR (15)(G)). |
Movement restrictions
| Restriction | In Missouri |
|---|---|
| Night travel | Daylight hours only |
| Weekends | Not specified |
| Holidays | Restricted |
Movement hours (7 CSR 10-25.020 (9)/(11) + the 2026 holiday dates, verified 2026-07-12)
| Load / area | Window |
|---|---|
| Standard oversize | ½ hr before sunrise → ½ hr after sunset |
| OVERWEIGHT-ONLY (legal H · ≤12′6″W · ≤110′L) | continuous day & night; exempt from metro curfews — still blocked on holidays + tourist areas |
| >12′6″–16′ wide — statewide | no movement M–F 6:30–9:00 a.m. + 3:30–6:00 p.m. on non-divided routes |
| Metro areas (STL / St. Charles / Jefferson / KC / Springfield) | M–F rush closures ~6:30–9 & 3:30–6:30 (KC/Springfield 7–9 & 4–6) |
| Lake of the Ozarks (May 25–Labor Day) / Branson (May 1–Nov 30) | no Saturday/Sunday movement on the listed segments |
| Super Heavy >16′ wide | no Sat/Sun grant — (15)(F)3 allows weekend travel only ≤16′ wide |
| 6 holidays | noon the last business day before → ½ hr before sunrise the first business day after (2026: May 22–26, Jul 2–6, Sep 4–8, Nov 25–27, Dec 24–28, Dec 31–Jan 4) |
| Weather | no movement on snow/ice, hazardous crosswinds, visibility <500′; >14′ wide stops when 2-lane dirt shoulders are wet |
Where these permits come from
If you file yourself, this is the office you are dealing with. Check the linked page — some states issue OS/OW permits through their highway patrol or revenue department rather than the DOT.
| Missouri permit office | |
|---|---|
| Permit office | 866-831-6277 |
| [email protected] | |
| Permit portal | MoDOT Carrier Express (MCE) — modot.org/mce → mcs.modot.mo.gov/MceWeb, 24/7; all OSOW permits apply online; superloads ~2 weeks |
| Information | Official page |
RSMo §§304.170/.180/.190 + 7 CSR 10-25.020 (eff. 3/30/2025 · modot.org · in effect since 2025-03-31 · source read 2026-07-12. Fees and rules change; the linked document is always the authority.