When it became illegal to overtly exclude people of color from purchasing neighborhood homes, the powers-that-be excluded people more subtly using land-use codes and neighborhood covenants like single-family residential zones, minimum lot sizes, and minimum square footage. In transportation, two extensively-used measures that exclude are v/c (volume/capacity) and LOS (Level-of-Service; derived directly from v/c).
The traffic engineering standard of v/c has been used for decades to describe how well a road can handle its traffic, and to determine when a road needs more lanes. As v (actual traffic volume) approaches c (maximum volume at capacity) and v/c nears the value of 1, the road congests. The practice is to reduce v/c below a specified maximum value (an “engineering standard”) by increasing the road capacity “c” with added lanes until v/c is below the standard, and will stay below it for the next 20 years. Continue reading “Transportation’s Exclusionary Measure “v/c” (volume/capacity) currently means vehicles/color.”