Eli5 How are carpool lanes supposed to help traffic? It seems like having another lane open to everyone would make things better?

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I live in Los Angeles, and we have some of the worst traffic in the country. I’ve seen that one reason for carpool lanes is to help traffic congestion, but I don’t understand since it seems traffic could be a lot better if we could all use every lane.

Why do we still use carpool lanes? Wouldn’t it drastically help our traffic to open all lanes?

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72 Answers

Anonymous 0 Comments

It convinces a lot of people to put more than one person into one car.

Also, if you add another lane, people move over time, build new houses, and build new traffic patterns. If you have a full highway today already more than two lanes in each direction, adding one more lane… eventually fills up just the same, every time.

Extra lanes subsidize – give money to – people building low density houses, like ranch houses spread out whoa across California. Problem is that doesn’t work forever, as it turns out.

Anonymous 0 Comments

It convinces a lot of people to put more than one person into one car.

Also, if you add another lane, people move over time, build new houses, and build new traffic patterns. If you have a full highway today already more than two lanes in each direction, adding one more lane… eventually fills up just the same, every time.

Extra lanes subsidize – give money to – people building low density houses, like ranch houses spread out whoa across California. Problem is that doesn’t work forever, as it turns out.

Anonymous 0 Comments

It seems kinda counterintuitive but more lanes usually doesn’t mean less traffic.

It usually means just more cars stuck in traffic.

Carpool lanes are there to encourage multiple people taking 1 car

Anonymous 0 Comments

It seems kinda counterintuitive but more lanes usually doesn’t mean less traffic.

It usually means just more cars stuck in traffic.

Carpool lanes are there to encourage multiple people taking 1 car

Anonymous 0 Comments

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Anonymous 0 Comments

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Anonymous 0 Comments

I think it’s to reward people for taking a car together.

Thought being if two people are in one car then they are not driving two different cars.

Anonymous 0 Comments

I think it’s to reward people for taking a car together.

Thought being if two people are in one car then they are not driving two different cars.

Anonymous 0 Comments

There’s usually fewer cars in the carpool lane, so people using it get a better commute. The people carpooling are in one car instead of 2-5 cars, so there’s fewer cars in all lanes now, and everyone else gets a slightly better commute.

Anonymous 0 Comments

There’s usually fewer cars in the carpool lane, so people using it get a better commute. The people carpooling are in one car instead of 2-5 cars, so there’s fewer cars in all lanes now, and everyone else gets a slightly better commute.