A nested hierarchy of streets - a Fused Grid
Nested Hierarchy of Network Elements: Each class of roads forms a progressively larger grid from collector to Minor Boulevard and to Major Boulevard and on to the freeway or highway. Local streets (white) form a virtual grid of capillaries.
--------------------------------------------------------------------------------
New urban transportation means such as trains, trucks, buses, cars and bicycles demand a suitable network. The 2000-year antiquated, uniform grid and the dentrite networks of the fifties have proven inadequate for many reasons.
A nested hierarchy of roads of increasing importance would serve these new mobility modes well. This configuration prevents cars from going through the 16 ha quadrant (or "sanctuary") cell but allows full permeability at the scale of neighbourhood and district. These transportation scales form continuous interlocking grids, each designed for progressively higher volumes, heavier load traffic and longer distance connections.
The quadrant provides a peaceful haven to about 500 families, a small village with its central square.
Higher volume arteries are generally divided with a raised median preventing left turns, except at intersections. In this version, they are divided by a city block of a width suitable to the location of the development.
This entire system , a Fused Grid, represents a blend of two previously used network patterns, each of which prevailed until it became obvious that it could not serve all mobility modes equally well.
--
For more visual examples of the Fused Grid concept see Albums: 3-d Models, Neighborhood layouts and conventional-grid- to- fused-grid transformations.
For an explanation of the model look up: Fused Grid in Wikipedia.
A nested hierarchy of streets - a Fused Grid
Nested Hierarchy of Network Elements: Each class of roads forms a progressively larger grid from collector to Minor Boulevard and to Major Boulevard and on to the freeway or highway. Local streets (white) form a virtual grid of capillaries.
--------------------------------------------------------------------------------
New urban transportation means such as trains, trucks, buses, cars and bicycles demand a suitable network. The 2000-year antiquated, uniform grid and the dentrite networks of the fifties have proven inadequate for many reasons.
A nested hierarchy of roads of increasing importance would serve these new mobility modes well. This configuration prevents cars from going through the 16 ha quadrant (or "sanctuary") cell but allows full permeability at the scale of neighbourhood and district. These transportation scales form continuous interlocking grids, each designed for progressively higher volumes, heavier load traffic and longer distance connections.
The quadrant provides a peaceful haven to about 500 families, a small village with its central square.
Higher volume arteries are generally divided with a raised median preventing left turns, except at intersections. In this version, they are divided by a city block of a width suitable to the location of the development.
This entire system , a Fused Grid, represents a blend of two previously used network patterns, each of which prevailed until it became obvious that it could not serve all mobility modes equally well.
--
For more visual examples of the Fused Grid concept see Albums: 3-d Models, Neighborhood layouts and conventional-grid- to- fused-grid transformations.
For an explanation of the model look up: Fused Grid in Wikipedia.