I just had to go look.. Ontario's prohibition re: traveling with propane tanks "on". It may have been in there at some point in time, but spending the last while reviewing Ontario's Highway Traffic Act, R.S.O
revisions from Dec, 2012 to current, there is no such law at this time, and no prohibition from the Ministry of Transportation other than to limit the quantity that can be carried (recreational vehicles are limited to 2 - 60# tanks. Providing they are connected to a regulator and secured in or on the vehicle.).
Did you know it was against the law to ride a horse on the King's Highway though?
They DID have some interesting information I didn't know before.
Propane as a Fuel
Propane is non-toxic – it will not contaminate the soil or the surrounding environment.
Propane is odourized – an odourant called Ethyl Mercaptan is added to propane so that leaks are easily detected.
Propane is lead-free.
Propane contains extremely low levels of sulphur.
Propane has the lowest flammability range of all alternative fuels (2.4 – 9.5%) – so there must be the right combination of propane and oxygen, if there is too much or too little propane it will not burn.
Propane’s ignition temperature is approximately 920° - 1020°F, gasoline’s ignition temperature is 495°F – therefore, gasoline will burn or explode at a much lower temperature than propane.
I feel better now.