David Edmondson
thegreatermarin.bsky.social
David Edmondson
@thegreatermarin.bsky.social
Urban planner, specializing in transportation, but posts a helluva lot about indigenous political cartography. aka theGreaterMarin. Find me as @OctaviusIV elsewhere, too. DC and SF.
I feel like there's a way to drag John Muir's racism against indigenous peoples into this.
November 14, 2025 at 9:15 PM
On the same token, the folks who say they get tickets all the time when they go to the city are being whiny, demonstrably bad drivers. But for normies, they want to drive safely and the speed limit. A DOT shouldn't then encourage them to break the law with bad design.
October 30, 2025 at 3:43 AM
The difference is that roads, in my mind, do communicate, sometimes in very obvious, "loud" ways, which I'd describe as yelling.

It is annoying when a city designs a system that says two contradictory things: speed, but don't speed. It's bad, unsafe, and makes people feel manipulated. And annoyed.
October 30, 2025 at 3:40 AM
The psychology of roadway design is well documented. Wider lanes means people tend to go faster, for instance, while chicanes or vertical elements nearer the lanes do the opposite.

A road's speed and expectations should be self-enforcing and clear to the driver even if they missed the signs.
October 30, 2025 at 3:19 AM
Also: these sorts of speed traps sour everyone on speed cameras so they can't be deployed like they should be, which is everywhere.

DC is particularly egregious, with some freeway-style roads having outrageously low limits, like 40mph on a 60mph design.
October 30, 2025 at 2:42 AM
(And we all outsource our thinking, it's a necessary part of living in society.)
October 21, 2025 at 9:37 PM
Not the first time this very specific critique has surfaced.

But the failure isn't idiocy; it's what happens when the people you outsource your thinking to are deliberately gaslighting you.

Don't hate the player, hate the game.
October 21, 2025 at 8:49 PM
Well, yes. Shitty signalization practices are shitty.

But given that they generally look the same, one risks rewarding inaccessible design and punishing accessible design.
October 15, 2025 at 9:10 PM
:( They really need to read my GGWash series on induced demand :(
October 15, 2025 at 12:33 AM
Reposted by David Edmondson
Several schools see a majority of students walking and rolling.

It's clear what those schools have in common:
-Nearby relatively dense housing (9+ DU/acre)
-Adjacent protected bike infrastructure
-Very little parking/auto circulation
October 14, 2025 at 4:25 PM
Ehhh... local engineers have a lot of freedom to apply those standards, and having a model at the state level will force the district offices and locals to adopt better practices.
October 14, 2025 at 4:26 PM
No but really MDOT and VDOT both need to have an air-tight set of standards that relentlessly centers pedestrian and bicyclist safety and accessibility.

As long as there is a hint of an option it'll be taken.

Sustainable Safety is my newest standards toy. sustainablesafety.nl
Sustainable Road Safety | Sustainable Road Safety
sustainablesafety.nl
October 14, 2025 at 4:16 PM
STANDARDS STANDARDS STANDARDS STANDARDS
a group of men are sitting around a table with a bowl of ashes on it
Alt: a group of men are sitting around a table with a bowl of ashes on it
media.tenor.com
October 14, 2025 at 4:14 PM
Ew.

I've got a blog post I'm drafting in my head about boulevards and retrofits. I'm mostly thinking about stroads like New Hampshire Ave or Rockville Pike, but this is a good example of another kind of retrofit: how to make a true through road work well for all users.
October 14, 2025 at 4:05 PM
That's certainly what it looks like! Is the design being done by the county itself or by developers along its route? If the former, then it could be changed; if the latter, then it's probably way too late.
October 14, 2025 at 2:56 PM
I don't think you can fix the intersection without fixing the roads, which would probably mean much better shared-use path designs and extreme traffic calming on both.

A signalized roundabout is my guessed-at interim solution here, but the main thing is taming the roads themselves.
October 14, 2025 at 2:34 PM
It's too big because the roads are too big. That isn't the fault of the intersection design; it's the fault of the road designs it needs to accommodate. You have a 6-lane surface highway and 4-lane highway, with a design for Observation Dr intended for future extension.
October 14, 2025 at 2:31 PM