The point he makes is correct of course, but the way he does the comparison is not very honest. If he wants to compare to the maximum capacity of a tube train, he'd also have to take the maximum capacity of a car, not the average passengers.
When you increase the number of passengers on a train(e.g. rush hour), the volume doesn't increase. The size of the train stays fixed up until it hits capacity.
When you increase the number of passengers on a road, they tend to still have around 1 car/person. Encouraging people to carpool just doesn't really happen. So an "at capacity" road still has most cars with just the driver. This is one of the main reasons cars are so inefficient, people are lugging around capacity for 5 people and tons of cargo, but it never gets used even when the roads are "at capacity".
Trains are generally at their fullest when cars are at their emptiest, during commuter hours. Tube trains are near empty (maybe 10-15% of capacity) for most of the day and night, whereas those who do drive at those times are likely groups of workmen or otherwise groups of people going to the same place
Completely honest! All cars are at least 4.5m, especially in the city where hatchbacks like the golf (4.2m) reign supreme. And what driver doesn't love driving in bumper to bumper traffic, named for the more than two full car lengths between them and both the car in front and behind.
Not to say that the point they are dishonestly trying to make is invalid, but this is definitely playing with assumed numbers to exaggerate the point.
This comparison is about road capacity, not car capacity.
During rush hour there are more cars on the road, there are not more people in each car. Unlike a metro. Every car at max capacity is an unrealistic scenario, whereas a full metro certainly is not.
No because on a busy time of the day it's not hard to reach maximum capacity or close to maximum capacity on a train. But if those individuals decided to drive they would not use their cars to maximum capacity. Or you can look at it the other way around. If people driving right now (therefore the average use) started to use the train, they would not use the train up to its average use. They would use it to its maximum capacity.
Eh I'm not so sure I agree with that. Competent subway systems in rush hour tend to be completely full whereas cars in rush hour typically only have a single person inside. So I do believe it's an apples-to-apples comparison in the ways that actually matter.
Agreed its not very honest. Transportation is about getting places, not filling roads. Average speed of the tubetrain is more than double that of cars, even without dumping all of these extra people onto the roads. After accounting for that, you would need to quadruple the length so that it can match the passenger miles.
At rush hour, you will see full trains and streets full of cars with only one person in each. Cars don't fill up when it gets busy, but trains do.
There's breaking distance for 20mph traffic, and trains actually do run at 90 second intervals.
You can change trains if the one you're on doesn't match your route, or combine it with other modes. But that isn't what this comparison is about, it's about the space they take up.
This is extremely stupid because, to be an accurate model of the effect of congestion on rail travel, people would have to get out of their car, perform a magic trick to disappear it, and then hop into a stranger's car every time they entered a congested area.
Given that nobody has ever done this, we can see that your comment is just bizarre mental gymnastics.
Now try adding up all the square footage parking spaces take.
For example, consider that adding a parking space to a 400 sq.ft. studio apartment — or adding two spaces to a 800 sq.ft. two-bedroom — effectively increases the total square footage by a whopping 50%. And since concrete parking decks are more expensive to build than habitable area of dwelling units, that likely represents a greater than 50% increase in costs.
And yet people unironically defend minimum parking requirements while simultaneously removed about housing costs.
Not unreasonable for slow-ish city traffic. Should be more for highway speeds, sure, but he compares it to the tube and overlays the distance on London.
Overlay London with roads wide enough to carry as much capacity as the tube lines underneath (and somewhere to put those cars) and see if there's any space left?