What Colorado 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 2026-07-06; we last read the source on 2026-07-06.
Oversize permit
$30
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 $30
Scales with weight and axle count — 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 Colorado and you need a permit for this state.
Limit
Interstate
Off-interstate
Width
8'6"
8'6"
Height
14'6"
14'6"
Length
70'0"
70'0"
Gross weight
80,000 lbs
85,000 lbs
Single axle
20,000 lbs
Tandem axle
36,000 lbs
Trailer length
57'4"
What the permit costs
Colorado 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.
4-lane (Green-map basis)
Width
Requirement
Over 10'0"
Not permittedMetro curfews (Rule 401, liftable only by Chapter 6/Superload): Denver-area listed segments 6–9 a.m. + 3–6 p.m. M–F; Colorado Springs & Pueblo 7–9 a.m. + 4–6 p.m. M–F; SH 82 Aspen–Carbondale same windows; Central City area travel ONLY 3–11 a.m.; US 6 Clear Creek Canyon (SH 58↔SH 119) prohibited at ALL times. Overweight-only loads ≤110,000 lb meeting 40/30-mph capability are exempt (Rule 400).
Over 12'0"
1 rear escort (night only)Night, width over 12' to 14': one pilot in the REAR on 4-lane highways (Rule 408.3.2), plus front flasher + 2–3 rear flashing yellow lights (408.3.1). Over 14' wide: night travel prohibited without a Chapter 6 Special (408.3.3).
Over 13'0"
1 rear escortWidth over 13' on Green-map 4-lane highways: one rear pilot OR a rear flashing yellow light (Rule 408.2.4 — the light satisfies the requirement; billed as the pilot)
Over 17'0"
Conditions applyWidth over 17' exceeds every map color's ceiling → Chapter 6 Special permit ($250; minimum one front + one rear pilot per Rule 603; 3–5 business days, currently up to 2–3 weeks per CDOT's Bridge-section advisory).
Height
Requirement
Over 16'0"
height poleOver 16' high: travel prohibited unless a front pilot with a height pole leads (Rule 409.2; the front escort supplies the non-conductive pole, Rule 505.1.7) — and 16' is the annual-permit ceiling (Rule 304.2.1), so >16' takes the Chapter 6 Special process (Rule 608). Eisenhower–Johnson Tunnels: over 13'11" high PROHIBITED through the tunnels (Rule 403.2).
Over 17'0"
Marking requiredOver 17' high: a licensed signal contractor must accompany the load through all intersections controlled by overhead traffic signals (Rule 409.4). Permittee must pre-resolve all overhead-line/railroad conflicts with utilities before travel (Rules 409.1, 607).
Over 17'6"
route surveyOver 17'6" high: route survey required with the application (Rules 303.16, 409.3).
Length
Requirement
Over 115'0"
1 rear escortOver 115' on 4-lane highways: one pilot in the rear (Rule 410.3).
Over 130'0"
route surveyOver 130': route survey required (Rule 303.17) AND exceeds the 4-lane annual maximum (Rule 304.2) → Chapter 6 Special.
Front overhang
Requirement
Over 15'0"
1 front escortFront overhang over 15': front escort (Rule 411.1). Over 25' front overhang exceeds the annual maximum → Chapter 6 (Rule 304.2). Night: cluster lights on any overhang (Rule 408.3.4).
Rear overhang
Requirement
Over 25'0"
1 rear escortRear overhang over 25': rear escort (Rule 411.2). Over 35' rear overhang exceeds the annual maximum → Chapter 6 (Rule 304.2). Projections over 4': red flag by day, red light/lantern at night (§42-4-209).
Weight
Requirement
200,001 lbs and over
Marking requiredGVW over 200,000 lb = Chapter 6 Special: flat $250, minimum one front + one rear pilot (Rule 603), 3–5 business days (Bridge-section advisory: up to 2–3 weeks). THIRD-PARTY WEIGHT DOCUMENTATION must be carried in-vehicle (§42-4-510(1)(b)(IV), SB24-220 eff. 8/7/2024) — missing docs = $1/lb over the authorized weight (§510(12)(e)). Operating rules: ≤10 mph on Department-restricted bridges, center-lane bridge crossings, rear 'CAUTION: THIS VEHICLE MAY SLOW TO 10 MPH TO CROSS BRIDGES' sign (Rule 407.3). Chain law: overweight-only ≤200,000 lb may chain up and continue (Rule 405.5) — above 200k case-by-case.
500,000 lbs and over
superload permitGVW 500,000 lb OR MORE that occupies two lanes (width over 15', Rule 609.1) — or an unladen expandable dual-lane transport trailer — = Superload (§42-4-510(1.7)(a)): flat $800, speed ≤25 mph on highway / ≤10 mph on structures (§510(1.7)(b)(III)), entry-point inspection at permittee's expense (§510(1.7)(e)), Port of Entry notified.
2-lane (Green-map basis)
Width
Requirement
Over 10'0"
Not permittedMetro curfews (Rule 401, liftable only by Chapter 6/Superload): Denver-area listed segments 6–9 a.m. + 3–6 p.m. M–F; Colorado Springs & Pueblo 7–9 a.m. + 4–6 p.m. M–F; SH 82 Aspen–Carbondale same windows; Central City area travel ONLY 3–11 a.m.; US 6 Clear Creek Canyon (SH 58↔SH 119) prohibited at ALL times. Overweight-only loads ≤110,000 lb meeting 40/30-mph capability are exempt (Rule 400).
Over 12'0"
1 front escort (night only)Night, width over 12' to 14': one pilot in the FRONT on 2-lane highways (Rule 408.3.2), plus front flasher + 2–3 rear flashing yellow lights (408.3.1). Over 14' wide: night travel prohibited without a Chapter 6 Special (408.3.3).
Over 13'0"
1 front escortWidth over 13' on Green-map 2-lane highways: one FRONT pilot (Rule 408.2.4); keep to the farthest right lane over 13' (Rule 408.1). CORRIDOR COLORS TIGHTEN THIS: Blue corridors need a front pilot from >8'6" and front+rear over 11'; Yellow from >11'; Red corridors bar oversize outright without Chapter 6 (Rule 408.2). The corridor map is COOPR-gated — confirm route colors.
Over 15'0"
1 front escort + 1 rear escortWidth over 15' to 17' on Green-map 2-lane highways: front pilot + rear pilot or rear flashing yellow light (Rule 408.2.4 — billed as the second pilot)
Over 17'0"
Conditions applyWidth over 17' exceeds every map color's ceiling → Chapter 6 Special permit ($250; minimum one front + one rear pilot per Rule 603; 3–5 business days, currently up to 2–3 weeks per CDOT's Bridge-section advisory).
Height
Requirement
Over 16'0"
height poleOver 16' high: travel prohibited unless a front pilot with a height pole leads (Rule 409.2; the front escort supplies the non-conductive pole, Rule 505.1.7) — and 16' is the annual-permit ceiling (Rule 304.2.1), so >16' takes the Chapter 6 Special process (Rule 608). Eisenhower–Johnson Tunnels: over 13'11" high PROHIBITED through the tunnels (Rule 403.2).
Over 17'0"
Marking requiredOver 17' high: a licensed signal contractor must accompany the load through all intersections controlled by overhead traffic signals (Rule 409.4). Permittee must pre-resolve all overhead-line/railroad conflicts with utilities before travel (Rules 409.1, 607).
Over 17'6"
route surveyOver 17'6" high: route survey required with the application (Rules 303.16, 409.3).
Length
Requirement
Over 85'0"
Marking requiredMOUNTAINOUS 2-lane highways (hash-marked on the CDOT map): over 85' takes a front pilot (Rule 410.1), and over 110' exceeds the mountainous annual maximum → Chapter 6 (Rule 304.2). Route-dependent — I-70 west, US 6/40/50/160/550 corridors are largely mountainous.
Over 110'0"
1 front escortOver 110' on non-mountainous 2-lane highways: one front pilot (Rule 410.2). Over 120' exceeds the non-mountainous 2-lane annual maximum → Chapter 6 (Rule 304.2).
Over 130'0"
route surveyOver 130': route survey required (Rule 303.17); already Chapter 6 territory on every 2-lane class.
Front overhang
Requirement
Over 15'0"
1 front escortFront overhang over 15': front escort (Rule 411.1). Over 25' front overhang exceeds the annual maximum → Chapter 6 (Rule 304.2). Night: cluster lights on any overhang (Rule 408.3.4).
Rear overhang
Requirement
Over 25'0"
1 rear escortRear overhang over 25': rear escort (Rule 411.2). Over 35' rear overhang exceeds the annual maximum → Chapter 6 (Rule 304.2). Projections over 4': red flag by day, red light/lantern at night (§42-4-209).
Weight
Requirement
200,001 lbs and over
Marking requiredGVW over 200,000 lb = Chapter 6 Special: flat $250, minimum one front + one rear pilot (Rule 603), 3–5 business days (Bridge-section advisory: up to 2–3 weeks). THIRD-PARTY WEIGHT DOCUMENTATION must be carried in-vehicle (§42-4-510(1)(b)(IV), SB24-220 eff. 8/7/2024) — missing docs = $1/lb over the authorized weight (§510(12)(e)). Operating rules: ≤10 mph on Department-restricted bridges, center-lane bridge crossings, rear 'CAUTION: THIS VEHICLE MAY SLOW TO 10 MPH TO CROSS BRIDGES' sign (Rule 407.3). Chain law: overweight-only ≤200,000 lb may chain up and continue (Rule 405.5) — above 200k case-by-case.
500,000 lbs and over
superload permitGVW 500,000 lb OR MORE that occupies two lanes (width over 15', Rule 609.1) — or an unladen expandable dual-lane transport trailer — = Superload (§42-4-510(1.7)(a)): flat $800, speed ≤25 mph on highway / ≤10 mph on structures (§510(1.7)(b)(III)), entry-point inspection at permittee's expense (§510(1.7)(e)), Port of Entry notified.
>11′ wide: stop for tunnel-superintendent clearance; >13′11″ high prohibited
3 summer holidays (Rule 404.3)
Memorial/Independence/Labor Day: no travel 6 a.m.–9 p.m. + preceding Friday noon–9 p.m.; New Year's/Thanksgiving/Christmas NOT restricted (LVCs only)
Weather
oversize holds under 1,000′ visibility; OW-only ≤200k may chain and continue (Rule 405.5)
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.
2 CCR 601-4 CURRENT edition (SOS CCR portal, eff. 03/30/2020 emergency / substantive text eff. 04/16/2018 · freight.colorado.gov · in effect since 2026-07-06 · source read 2026-07-06. Fees and rules change; the linked document is always the authority.
Other states
Colour shows how each state prices a permit. Alaska, Hawaii and DC are not served.
