Editing 2684: Road Space Comparison

{{comic
| number    = 2684
| date      = October 12, 2022
| title     = Road Space Comparison
| image     = road_space_comparison_2x.png
| imagesize = 740x1157px
| noexpand  = true
| titletext = I wonder how hard it would be to ride an electric scooter in a hamster ball.
}}

==Explanation==
The comic is a parody of a common comparison done in arguments for public transport and walkable cities - the amount of usable space taken up by cars and car-centric infrastructure that could be eliminated for other useful public amenities. The first of these may be from 1965[https://www.ltmuseum.co.uk/collections/collections-online/posters/item/1983-4-7561].

The first 4 images are common, real-life comparisons involving people walking, people on bicycles, public transport, and cars, which distinctly show how cars take up significantly more space for the same number of people than the other methods of transport. However, from this point the comic becomes more and more absurd in its comparisons.

* The 5th image shows 50 people on what is reported to be a tandem bicycle, although it seems more likely to actually be a string of {{w|trailer bike}}s, due to it not being rigid and the separation from one person to the next is larger than is typical for tandem bicycles. This would obviously be impractical in a city due to the tandem's sheer length and it would not be able to work with fewer than 50 people due to its sheer mass. The [https://www.active.com/articles/bicycle-built-for-52-pedals-into-guinness-book longest compound] [https://www.deseret.com/2000/7/31/19521141/family-s-bike-goes-to-great-lengths cycle] holds 52 people, while an actual tandem bicycle exists that has at least [https://www.pinterest.co.uk/pin/346988346267601955/ 35 seats].

* The 6th one involves 20 people driving 40 cars, with each person driving 2 cars at a time by straddling them in the middle. Besides being unwieldy and impractical, it would also be extremely dangerous as the cars could go out of control at any time. Perhaps the cars would be a paired mix of left-hand-drive and right-hand-drive models, although with enough push-rods/levers (to also reach the traditional foot controls, and also gear sticks unless ''fully'' automatic) this might not be as important. However, even if the cars were perfectly safe to drive, it would be unsafe to drive them on most roads; roads with only one lane per direction are common, everywhere from city streets to exit ramps, and attempts to drive a pair of cars down such a road side by side are unlikely to end well. (Of course, worse than any of these petty safety concerns is the fact that each person takes up twice as much road space, making most infrastructure a bit less efficient. Of all the examples, this is the most wasteful of space, with the entire road being taken up by only 20 people.)

* The 7th one has 30 cars riding on 6 buses by stacking them on top of each other. Assuming the same people-per-car/bus from the earlier examples, this arrangement would have about 345 people riding on the same road! (Unless, of course, the buses are carrying 30 cars ''instead of'' their normal passengers.) In addition, people getting out of the cars when they reach their destination would be a problem for most cars in this arrangement due to them being stacked under other cars or surrounded by them. And as in the previous example, it would be impossible to safely drive anywhere without two clear lanes...and the body count would be considerably higher.

* The 8th panel has 50 people in hamster balls. Randall has shown his interest in human sized [[:Category:Hamster Ball|hamster ball]] transportation before, and indeed, for some people, this might be an enjoyable way to traverse a road, provided no other hamster balls try to drive into you and knock you off the road, and other traffic that could pose a greater hazard has been eliminated.
** The [https://www.explainxkcd.com/wiki/images/archive/0/0f/20221222053911%21road_space_comparison_2x.png original image] showed 39 hamster balls, implying that roughly one in four had a passenger; under these constraints, they appear to be slightly more efficient than cars. Another explanation for 39 balls was that the full number of hamster balls was more than were able to be shown on the road diagram. This latter was supported by the fact that only one "person dot" is shown in each of the hamster balls. However, since the diagram is supposed to show visibly what it looks like to have that many vehicles/people on the road at the same time, missing hamster balls negates the purpose of such a diagram. The later update belied the possibility of it being a purely illustrative problem.

* The 9th panel has 40 tiny cars pulling a big one. Such feats of strengths are a common sight while setting world records, so maybe this is a world record attempt by the cars in question. It is unknown how many people fit in the big car; judging by its size, it likely fits more than a single bus and less than three. It is also unclear whether the tiny cars can fit a human driver, or if they would need to be driven remotely.

* The 10th panel is a 50 person variation on the classic {{w|wolf, goat and cabbage problem}} (which has been referenced before in [[589: Designated Drivers]], [[1134: Logic Boat]], and [[2348: Boat Puzzle]]) except this one involves 30 goats, 20 cabbages and 10 wolves trying to cross a section of road that is underwater, using a single boat. The fact that there is a conveniently placed dock at the edge of the water suggests that this is a ford with provision for those crossing by foot, or at least that the road gets flooded often enough to warrant a permanent dock to be installed. It is not known how many people (or cabbages for that matter) the boat fits, but since humans significantly outnumber the goats, cabbages and wolves, it seems like a much simpler problem, though not necessarily without difficulty.

The initial bicycles and singular bus are actually (mostly) using the left-hand lane of the three shown, for whatever reason. This would not be unusual on British highways or {{w|Left- and right-hand traffic#Worldwide distribution by country|other countries}} using their system, whether the lanes seen are just one of the directional carriageways of a multi-lane split highway or the centre-lane is a gantry-signed {{w|Reversible lane|'tidal lane'}} of a fully two-way street. Yet people who have to walk on a road (due to no footway) are advised to walk facing oncoming traffic (the right-hand side, in the same jurisdiction) and not bunched up. It would be interesting to know why Randall, much more familiar with US road conventions, would have offset these various road-users the way he did (rather than hogging the central lane, or across the ''entire'' highway width as he did with the other diagrams in the series).

The title text proposes a problem related to another alternative form of transport &mdash; the electric scooter. Randall wonders how well an electric scooter would function when run inside the hamster ball. While this could function like a spherical {{w|monowheel}}, it might also be very dangerous.

==Transcript==
:[Overhead views of ten segments of highway in two rows with a caption above. Each road segment has a caption and a different scenario.]
:Road Space Comparison

:[50 people in the bottom left of the highway, all fitting into a single lane and taking up about a fourth of the length of the road.]
:50 people walking

:[50 bike riders in the bottom left of the highway, extending about halfway up the road and spilling over slightly into the second-to-leftmost lane]
:50 people riding bikes

:[A single bus, fitting into roughly the same space as the 50 people from the first scenario]
:50 people riding a bus

:[33 cars, taking up the entire length of all three lanes]
:50 people in 33 cars

:[One long string of connected bike riders, curving slightly and extending down the entire length of the middle lane]
:50 people on one tandem bicycle

:[40 cars in pairs, each pair with a single person straddling the windows between them. They take up the entire highway segment and each pair extends partway from the outer lanes into the middle]
:20 people driving 40 cars

:[Six buses on the lines between lanes taking up the majority of the highway, 30 cars arranged in stacks across the top]
:30 cars riding on 6 buses

:[50 evenly-spaced hamster balls with a person inside each, taking up the majority of the highway except a space at the top]
:50 people in human-sized hamster balls

:[An oversized car taking up all three lanes at the bottom of the highway, with a pair of ropes and a beam attached to the front bumper. The beam is attached to 40 miniature cars in front arranged into four lines]
:One giant car pulled by 40 tiny ones

:[The road is bisected by a large river taking up about half of its original area, with a dock and rowboat attached to the lower shore. 50 people, 30 goats, 20 cabbages, and 10 wolves are in groups on the same side]
:50 people with 30 goats, 20 cabbages, and 10 wolves.


{{comic discussion}}
[[Category:Hamster Ball]]
[[Category:Animals]]
[[Category:Food]]
[[Category:Logic]]