I always thought this idea had greater potential for extremely long car rides. If I'm taking a business trip from NYC to Boston, I'd be okay with a tagalong as long as they provide some gas money. It would have to be something scheduled in advance, but the ride would probably be more pleasant than taking a bus, and I'd be willing to drop the tagalong off somewhere besides the city square.

There is such a service in Europe, called Bla Bla Car[0].

[0] https://www.blablacar.com/

There's a Montréal-Toronto facebook group with 18k members I've used a few times to save on gas money. Typically people charge $30-$40 per seat for the 6 hour trip.

I drove a guy who was trying to make an app which would do this, but I can't remember what it was called. It started as a Vancouver-Whistler ride share e-mail list.

This sounds like BlaBlaCar which is (I hear) popular in Europe.

it's relatively popular.

> there should be an Uber mode where the driver enters their destination and they get a notification when someone else is going to the same place

There is on Lyft: https://help.lyft.com/hc/en-us/articles/213586028-How-to-use...

It's also on Uber

They have that.

Isn't that more or less Lyft Line?

There is.