Legal towing check for ~46 AU vehicles — compliant/marginal/illegal + the binding constraint.
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Use when someone asks whether an Australian vehicle can legally tow a particular caravan or trailer — "can my Ranger tow a 3 tonne van", "am I over GCM", "what is the heaviest caravan I can tow", "is my towing setup legal". Given a vehicle + variant and the caravan's ATM (plus optional tow-vehicle payload), returns whether the combination is legally compliant, marginal or illegal, WHICH limit binds (braked capacity, towball download, GVM or GCM — often not the braked rating everyone quotes), the maximum ATM that is legal for that vehicle, and remaining payload. Manufacturer-spec information, not advice.
caravan Aggregate Trailer Mass (kg)
make + model, e.g. Ford Ranger
people + gear in the tow vehicle (kg)
trim/variant, e.g. V6 or SR5
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Use when someone asks whether an Australian vehicle can legally tow a particular caravan or trailer — "can my Ranger tow a 3 tonne van", "am I over GCM", "what is the heaviest caravan I can tow", "is my towing setup legal". Given a vehicle + variant and the caravan's ATM (plus optional tow-vehicle payload), returns whether the combination is legally compliant, marginal or illegal, WHICH limit binds (braked capacity, towball download, GVM or GCM — often not the braked rating everyone quotes), the maximum ATM that is legal for that vehicle, and remaining payload. Manufacturer-spec information, not advice.
| Argument | Type |
|---|
| Description |
|---|
| load | number | people + gear in the tow vehicle (kg) |
| van_atm* | number | caravan Aggregate Trailer Mass (kg) |
| variant | string | trim/variant, e.g. V6 or SR5 |
| vehicle* | string | make + model, e.g. Ford Ranger |
{
"type": "object",
"required": [
"vehicle",
"van_atm"
],
"properties": {
"load": {
"type": "number",
"description": "people + gear in the tow vehicle (kg)"
},
"van_atm": {
"type": "number",
"description": "caravan Aggregate Trailer Mass (kg)"
},
"variant": {
"type": "string",
"description": "trim/variant, e.g. V6 or SR5"
},
"vehicle": {
"type": "string",
"description": "make + model, e.g. Ford Ranger"
}
}
}