Anthropometric data is the measurement of the human body: heights, widths, reach, eye level and range of motion, usually reported as percentiles across a population.
Parking design is built around two sets of dimensions, the design vehicle and the people who drive, ride in and walk around it. Anthropometrics covers the second set. It explains why a stall that fits a car can still be a poor stall, and why a sign that is technically present can still go unread.
Where it shows up in a garage
- Stall width and door room. People need space beside the car to open a door and turn their body to get out. That space, not the car, is what wider stalls buy. See level of service.
- Sign height and sightlines. A driver’s eye sits roughly 3.5 feet above the pavement, a standing adult’s near 5 feet. Signs, mirrors and dynamic signs have to sit where both can see them under the clear height. See readability.
- Reach. Pay stations, ticket dispensers, intercoms and EV charger controls need to sit within reach of seated and standing users, including people using wheelchairs. See accessible parking.
- Walking. Stride length, walking speed and how far people will comfortably walk shape stair placement and vertical circulation.
Percentiles, not averages
- Designers usually work from a range, such as the 5th percentile adult woman to the 95th percentile adult man, rather than one average person.
- Reach limits are set by smaller users; clearances are set by larger ones.
- Accessibility standards add wheelchair and mobility device dimensions on top of the general population data. See ADA.
The Parkonomics view
Cars get the attention, but people are the real design load in a parking facility. A garage that fits the full range of human bodies is easier to use for everyone, and it rarely costs more than one designed around an imaginary average driver.
Related terms: Design Vehicle, Level of Service, Accessible Parking, Readability, Wayfinding, Compact Stall, Vitruvian Principle