A visual of what transit supportive densities look like for different transit modes
Recently, GreaterGreaterWashington blogged about density, using Google maps 3D images to show what different densities look like in Washington, DC. Visuals like these are so important because most people hear “density”, think “Manhattan” and can’t say “no” quickly enough. Last fall, we completed work as part of ConnectGreaterWashington and the Transit Corridor Expansion Guidelines that illustrated the differences in desired employment and/or residential densities within a transit walkshed by each mode.
As is typical for planning projects, especially when expanding transit service along new corridors, density is discussed and jobs and/or households per acre targets are tossed around. But most people (full disclosure, that includes me) do not know what 4 households per acre or 150 jobs per acre looks like. It is especially important because a residential target of 12 households per acre within a half-mile of a suburban Metrorail station, for example, does not mean that every residential dwelling needs to meet that target. Instead, within the half-mile radius, the overall density should be 12 or more households per acre. That gives plenty of room to have less dense single family homes (on small lots) and more dense high rise apartments with studios and one-bedrooms.
Below are example stations for each mode and the employment and/or residential density targets, along with images of the different building types that combine to meet or exceed the targets. We’d appreciate your feedback on whether they make sense to you and if they would resonate with the general public.
Metrorail (Suburban) Densities
Note, because of the variability in density across the Metrorail system, we created two types of Metrorail stations to estimate densities.