While that’s a fair point, it’s not the only example of planning ahead. I’m sure there’s plenty of other ways than the ones I came up with in a few seconds.
They could also pick a drive throughs that have enough room to leave the line. Less common in cities but they’re still there.
Edit: I’d also like to point out that their lights and sirens are designed specifically to get people’s attention and get them moved out of the way. More difficult if you’re trying to get a vehicle 10 cars up to move but it’s not like they’re stuck waiting like the rest of us would be.
I had the same question. I’m hoping the line shows total votes and the bars will increase as in person votes are added to the total