Assuming you are a Canadian citizen, Get urgent, express, weekend and statutory holiday emergency passport service in Canada:
We offer urgent and express passport services at certain locations in Canada. To find out if you can use these services, you must apply in person.
You must provide proof of travel for urgent service. You may also need to provide it for express service.
Proof of travel can be:
• an airline, bus or train ticket
• a written declaration, if travelling by car
• a travel itinerary showing travel proof of payment
• proof of illness or death in the family requiring immediate travel
Depending on the reason for your travel, you may need to show further proof that your situation is urgent.
We won’t be liable for any losses if we can’t deliver the passport in time for travel to you or your child. We recommend that you don’t finalize any travel plans until you get your passport.
If you're traveling by car, it looks like they'll accept a declaration stating your intent to do so. They're not really concerned with why you want to travel, just some proof that your travel is imminent. But the proof is only strictly required for urgent service (1-2 business days) and may not be needed for express service (2-9 business days).