Parking ramps usually suit an automatic or passive barrier, because they carry traffic every day and lead down to the lowest level of the site. The automatic barrier fits centers with a staffed control room, and the passive barrier suits ramps where nobody may be watching when the water arrives.
Public entrances and loading docks are usually closed with aluminum sets, made for each opening and stored on site. Each set needs a person to fit it, so with many entrances it helps to plan who fits which set and in what order.
Tenancies with their own street doors can be treated like individual stores, with aluminum, ABS or Oxford barriers depending on whether the tenant can fix anything to the shopfront.