Arizona Oversize / Overweight Permit Requirements
Legal-without-permit dimension limits, escort and pilot car thresholds, height pole rules, daylight-only windows, and holiday restrictions for Arizona oversize moves.
Legal limits without a permit
In Arizona, you can move a load without an OSOW permit up to these dimensions on the Interstate and designated highways. Anything over the limits requires a permit (and may require escorts — see below).
| Dimension | Without a permit | Permit required when |
|---|---|---|
| Width | 8′6″ (federal limit) | Anything wider |
| Height | 14′0″ | Anything taller |
| Combo length | 65′0″ | Anything longer |
| Gross weight | 80,000 lb | Anything heavier |
Escort and pilot car thresholds
When permitted, the following escort or movement-restriction rules apply in Arizona. Thresholds are conservative — your specific permit conditions may impose tighter limits depending on the route.
| Trigger | Dimension | Threshold | Detail |
|---|---|---|---|
| Rear pilot car | Length | 120'0" | Escort required for combos over 120' overall (front and rear escort case-by-case per ADOT Class C review). |
| Front pilot car | Front overhang | 20'0" front overhang | Front escort required when front overhang exceeds 20' (independent of overall length). |
| Rear pilot car | Rear overhang | 20'0" rear overhang | Rear escort required when rear overhang exceeds 20' (independent of overall length). |
| Police escort | Width | 16'0" | When more than 2 escorts are required (excess width/height/length/weight combined), Arizona requires 2 law enforcement escorts (R17-6-412 Table 4). |
| Height pole | Height | 15'0" | Height-pole-equipped front pilot required for loads over 15' high (mandatory during 3am-sunrise weekend transport per R17-6-409). |
| Rear pilot car | Width | 14'0" | Rear pilot car required for widths over 14' on Table 4 routes. Also required for any night/weekend movement over 11' wide. |
| Front pilot car | Width | 12'0" | Front pilot car required for widths over 12' on Table 4 state routes (R17-6-412). |
| Daylight-only movement | Width | 10'0" | Default operation is 1/2 hour before sunrise to 1/2 hour after sunset. Loads exceeding 10'W / 14'6"H / 120'L / 250k lb / 10' overhang lose continuous-travel exemption and require daylight-only (or 3am weekend transport with escort accompaniment per R17-6-409). |
| Weekend / holiday restriction | Width | 10'0" | No transport on 6 ADOT holidays (New Year's, Memorial Day, Independence Day, Labor Day, Thanksgiving, Christmas) for loads exceeding 10'W / 14'6"H / 120'L / 3' front overhang / 10' rear overhang. Holiday windows extend to noon of preceding business day (R17-6-409). |
Stop tracking these rules by hand.
OverSizeTMS encodes the per-state escort and dimension rules for every state plus DC. Enter the load dimensions and route, and the platform tells you which permits, escorts, and time windows apply automatically.
See how it works →Last updated 2026-06-06. Cross-checked against the state admin code.