What is access (ontsluiting)?
Access — in Dutch ontsluiting — is the way into and out of a building, area or site: the roads, paths, entrances, corridors and stairs by which people, vehicles and goods reach a place and leave it again.
The term is used at two scales. In urban planning it is about how a plot or neighbourhood connects to the road network and to public transport. In building design it is about internal access: the circulation spaces that make the usable rooms reachable.
Access at neighbourhood and plot level
- Primary access road — the route by which a neighbourhood connects to the wider network; it determines traffic loads and reachability for emergency services.
- Distributor and residential streets — the finer structure below it, usually with lower speeds and more emphasis on residential quality.
- Fire service access — appliances must be able to reach a building; authorities set requirements for standing areas and carriageway widths.
- Refuse, loading and servicing — often forgotten in the design, yet they strongly shape the street layout.
Access inside a building
- Single- or double-loaded — a corridor with rooms on one side or on both sides.
- Stair-core access — one staircase serving only a few dwellings per floor; very little circulation area, but hard to reach without a lift.
- Gallery (deck) access — an external walkway along the façade; efficient in area, but it needs care with privacy and wind.
- Central corridor access — an internal corridor, common in offices, hotels and care buildings.
Points to note
- Escape routes and travel distances are set by regulation; access and fire safety cannot be considered separately.
- Accessibility calls for step-free routes, adequate clear widths and a lift where there are level changes.
- The more circulation area, the less usable floor area — efficient access lowers the build cost per dwelling.
Related terms
- Zoning plan
- Building line
- Adaptable building
- Planning permission
- Escape route
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