A parking facility’s circulation system is the arrangement of ramps, aisles and turns that moves vehicles in, between levels, past available spaces and out.
It shapes nearly everything about a garage: how efficiently it uses space, how easy it is to find a spot, how fast it empties after an event and how safe it feels. The choice depends on site size, number of spaces, peak flows and whether customers are regulars or visitors.
Common types
- Sloped parking floors, where parking aisles themselves ramp between levels, as in a single helix or double helix.
- Flat floors with separate ramps, including speed ramps and express ramps.
- Split-level designs with half-level ramps between offset floors.
- Continuous flow designs that combine parking and ramping. See continuous flow.
Key choices
- One-way traffic, with angled stalls and narrower aisles, or two-way traffic with 90-degree stalls.
- Whether drivers must pass every space or can skip to their level.
- Separate entry and exit routes for high-turnover and event garages.
- Pedestrian paths that cross as few drive aisles as possible.
The Parkonomics view
Drivers judge a garage in its first two turns. A circulation system that is easy to understand saves time, reduces crashes and feels larger than it is.
Related terms: Single Helix, Double Helix, Continuous Flow, Speed Ramp, Express Ramp, Wayfinding