Canada

Yes, they normally pick them up within a couple days. Ours was picked up the next day.

I don't know how it is with federal elections, but I volunteered in Alberta's recent provincial one and the day after the election we were going around and collecting every single NDP sign we'd put out there first thing in the morning. There's a law about it, and we'd likely be wanting those signs for next election too.

There were very few yard signs for this provincial election, not sure why. But I'm seeing a lot of them scattered around as litter still. Maybe federal elections do it completely differently.

Actually, most campaigns send out a collection team in the day after election day to take down the big sign as well as signs put up on public property. They also typically pick them up from lawns as requested.

Some will wait a day or two to celebrate the win but sign pickup

Most candidates keep the signs from one campaign to another. It takes a while for new signs to be printed at the beginning of a campaign. So, using old signs means getting signs up in the early days before your opponents and saving costs.

These aren't lawn signs that individual supporters put up on their properties, they're signs that the candidates put up on public boulevards