How are tunnels solving traffic jams?

Not solving but alleviating, by rerouting transiting traffic through bypass routes underground. For example, in Washington DC:

https://en.wikipedia.org/wiki/9th_and_12th_Street_Expressway...

But does rerouting traffic through other bypasses actually alleviate traffic?

> Motorways and bypasses generate traffic, that is, produce extra traffic, partly by inducing people to travel who would not otherwise have done so by making the new route more convenient than the old, partly by people who go out of their direct route to enjoy the greater convenience of the new road, and partly by people who use the towns bypassed because they are more convenient for shopping and visits when through traffic has been removed

From https://en.wikipedia.org/wiki/Induced_demand

Do look at the "Studies" section of the same article, too.[1] It is far from established that induced demand outweighs the capacity increase from road construction.

[1] https://en.wikipedia.org/wiki/Induced_demand#Studies

Mayors of big towns are clearing city centers from cars and making them walkable again anyways (at least in Europe, I don’t know how it is being done in other places). If tunnels are the shortest path to get from one part of the city to another (like in Zurich), cars will use them.

A traffic network's purpose is to move people from point A to point B. If you double the lanes and they fill up, you've doubled the throughput. If traffic doesn't move any faster, it's because the old traffic jams were a bigger problem than was visible. You've still alleviated the issue by allowing twice as many people to reach their destination in the same amount of time.

There's an argument that assumes that building more lanes does not increase the number of people who travel, only the number of people who choose to do so by car. Then with fewer lanes, the same number of people still get from A to B but on bicycles or using public transport instead of cars.

These photos illustrate it well:

https://www.streetroots.org/news/2015/04/03/streets-are-ever...

Less cars on the road solves traffic jams. Not more roads. Traffic jams are insane, we see a single person sitting alone in a 3+ ton box idling his time and instead of seeing how absurd it is, we want to make bigger roads for more almost empty boxes. Nuts. The solution to traffic jams is excellent public transportation and last mile mobility. Not more roads and definitely not tunnels.

Tunnels don't really solve the problem well - they cost too much for what they do, and don't even do it well. Public transport (specifically expanding trains + e-bikes) is a much better, easier and already available solution.

Building rockets cost too much too and he reduced the cost and made it compeditive. He's trying to simplify and cheapen the cost of building a tunnel.

e-bikes should be banned. Cyclists are the worst. You get far more bad cyclists than you do bad drivers. When living in Australia 12 years ago, i almost got knocked over by cyclists over a dozen times when they run red lights, refuse to slow down.

At one point they were rebuilding the side-walk and so the workers coned off the bike path to let people walk for a week while the pavement work happened, in 1 week that it was closed off I saw cyclists verbally abuse people, myself included, for walking on a cycle way that was blocked off to cyclists and the workmen were tellign them to cycle on the road.

I would hazard that the bad drivers kill more people than the bad cyclists you speak of.

Don’t quote me on this but the last time I checked it was roughly…

~600 deaths 35,000 hospitalisation due to car accidents.

~85 deaths 13,000 hospitalisation due to cycling accidents.

But in any case when walking in the city I feel safe walking with cars. But I don’t feel safe with cyclists. They rush through red lights. Rush through intersections while people are crossing. I’ve witnessed accidents occur due to cyclists not following the laws. If they followed the laws and slowed down. Stopped and gave way like they are meant to. I wouldn’t have an issue.

> the workers coned off the bike path

Why didn't the workers cone off a lane from the street to make space for the bikes? Cars usually have easier alternatives, they can just take another lane.

EDIT: But anyway, the real viable alternative to cars is probably not bikes, it's trains and buses.

Because 1) literally no cars. And 2) there’s a bike lane on the other side of the road. The bike lane is bidirectional and the width of a car lane. All the parking in the street was removed for bike lanes.

Living in asia I love having MRTs.

The Boring Company takes machines made by other companies, and digs tunnels that anyone with those machines can dig to provide a solution that is largely impractical.

Pretty easy to get rid of traffic jams actually, you just get rid of the cars. Never been stuck in traffic in places where there aren't cars.

So throw the baby out with the bath water? Great plan.

In cities? Yes. You start preferencing more space efficient modes of transport, and traffic jams go away, while transport time decreases. If you’re going to put a tunnel with fixed access points under a city, it makes a lot more sense to run trains than private cars.

If you’re going to have a 4 lane road reserve two of the lanes for super high capacity vehicles (busses).

Traffic jams are a byproduct of the limits of physics. Once you reach a certain density it is simply impossible to provide enough private car parking and lane capacity.