Just Keep Turning

On February 10, 2013 · 16 Comments

I think it’s time for another participatory article. The 12MC audience seems to its like little puzzles and challenges. I had to drive to a local shopping center a couple of miles from my home yesterday afternoon to pick up my wife. An Interstate Highway stood between the two locations, acting as a natural barrier, with no direct straight-line route between them. This created a situation requiring the use of several roads both to find an underpass below the highway and then to snake my way back to the desired endpoint.

Once back home again, it occurred to me that I’d taken 9 completely different roads to move from Point A to Point B. The detours and turns increased the driving distance to 3.2 miles (5.1 kilometres). Thus, with some quick math, my little trip involved 2.8 roads per mile (1.7 roads/km). That’s a lot of roads and a lot of turns in a very short distance. Certainly I could find better, though.

Reston, Virginia



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I’m hamstrung by my own neighborhood because it’s built on a grid. Usually that’s a good thing. The most efficient path between two points rarely involves anything more than maybe three or four roads. Only an odd situation such as an inconveniently placed Interstate Highway could raise the count so I needed to look elsewhere.

There are large planned communities on the outer perimeter of my area, built in the style of the now largely discredited cul-de-sac model of urban sprawl. Those seemed ripe for better examples. Some residents have to take multiple roads to get anywhere, even to exit their housing developments. I picked a particularly remarkable occurrence on the metropolitan edge, Reston, Virginia, and quickly improved my result. That’s not intended to pick on the fine residents of Reston of course — I could have selected any of several other communities — it was the first one that came to mind.

The result: 7 roads in 1.2 miles = 5.8 roads/mile (3.6 roads/km).


Kissimmee, Florida



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What might confound the road network more than a planned community like Reston? How about a gated community combining the effect of two awful design elements: cul-de-sacs and limited access. I seemed to recall numerous gated communities in and around Orlando, Florida, and quickly found two such communities adjacent to each other in Kissimmee to wonderful effect.

The result: 9 roads in 1.2 miles = 7.5 roads/mile (4.7 roads/km).


Hot Springs Village, Arkansas



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Then I got greedy. If a gated community produced a great result then the largest gated community in the United States should score even better! That place is reputed to be Hot Springs Village, Arkansas (albeit without a citation). Sometimes assumptions aren’t scalable and this one may be an example. It’s one gargantuan gated community, that’s obvious, with an absolutely spellbinding spaghetti network of roads. The various water features and golf courses also increased road complexity and raised my hopes. However it was more grid-like than it appeared at first glance, using circular patterns rather than rectangles. I generated a decent score although I couldn’t raise it up to the level of Kissimmee or beyond.

Incidentally, when does a gated community grow so large that the alleged benefits of gates become meaningless? Hot Springs Village is 55.7 square miles with a population of nearly 13 thousand. I would have to assume that at some point along the continuum it reaches a semblance of equilibrium with the outside world.

The result: 8 roads in 1.1 miles = 7.3 roads/mile (4.5 roads/km). Good, not best.


Diamondhead, Mississippi



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I discarded size and seized upon the obstacle element introduced by Hot Springs Village. What about a planned, gated community with the addition of internal through-road barriers such as golf courses? I have family that live along the Gulf Coast of Mississippi and some of them are located in a community called Diamondhead that seemed to match the criteria. It’s a nice community that happens to have particularly weird streets. I nearly get carsick driving through Diamondhead with all of its crazy turns and switchbacks that drill to the depths of the development. In addition the oddity of Hawaiian-themed names in Mississippi has always confounded me although that’s not particularly germane to the topic today. I’ll just note the dissonance and move along.

I produced my best score yet. Just as importantly, I can reasonably expect to replicate this route in person some day.

The result: 8 roads in 0.8 miles = 10.0 roads/mile (6.2 roads/km); and a variation with 7 roads in 0.5 miles (map) = 14 roads/mile (8.7 roads/km) (if only Malino Place changed names at the T!).


The Contest and the Rules

It’s pretty simple. Try to improve upon 10.0 roads/mile. Feel free to use any of the communities I’ve explored already. I didn’t mine them exhaustively so better examples may be lurking in there. Alternately, feel free to examine places more familiar to you.

  • As always, the default route on Google Maps is the final authority. No additional manipulations are allowed. You can specify only the two endpoints (using lat/long to shorten the distance on the beginning and ending roads is fine).
  • A given road can be counted only once even if Google Maps says "bear left to remain on road X" or "turn right to remain on road Y" or "do a U-turn on road Z" or whatever. You’ll notice that I tossed the second instance of Manoo Street in my Diamondhead example (even though it approximated a turn)
  • Let’s not get silly. We can all find better examples using only three roads. I won’t place a minimum on the number of roads, however, anything with fewer than 7-or-so roads begins to lose credibility. The goal is to produce an example of ridiculousness without becoming a ridiculous example.
  • What if an arrow-straight road changes names multiple times as it crosses town boundaries? I guess it would count although it does conflict with the spirit of the effort. That might be a good idea for a different contest, though.
  • You may conduct your examination using whatever measurement of distance makes you happy. Use chains, nautical miles or astronomical units for all I care, however, please convert your calculations both to miles and kilometres when presenting results. Google has easy converters (e.g., mi to km and km to mi).
  • The results need to be repeatable. Provide the map link or embed the map itself within your comment.
  • In the event of a roads/mile tie, the "better" result will be the one that involves more roads. In other words, 20 roads in 2 miles would be a lot more impressive than 10 roads in 1 mile.
  • Extra kudos will be bestowed upon anyone who has actually walked, biked or driven the submitted route in person.

I would say that any example meeting or exceeding double-digit mileage results (10.0+ roads/mi) or an equivalent (6.2+ roads/km) is pretty impressive. You should feel free to pat yourself on the back and call it a day. I know that my best score can be improved upon however, and I wonder by how much. I need to find a community shaped like a maze or the capital on an Ionic column.

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12 Mile Circle:
An Appreciation of Unusual Places
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