Grid Plan. By: Yohany Socas # Alba Mora #

Grid plan. Plan in which streets run at right angles. Ancient Greece Hippodamian plan. Grid plan. 2

Ancient Grid Plan Mohenjo-daro and Harappa, 2600 BC,. Grid plan. 3

Egypt. Babylon, King Hammurabi. Grid plan. 4 The streets were wide and straigth Intersected at right angles

Miletus, 479 B.C. Roman. Teotihuacan. Grid plan. 5

Asia from the first millennium AD Japan and Korean grid planning. For reasons of defense, the planners of Tokyo eschewed the grid plan. Grid plan. 6

Europe and its colonies. Bastides of Southern France. 13th and 14th Renaissance. The baroque capital city of Malta, Valletta. Grid plan. 7 Rigid grid plan

Early United States The New Haven Colony. Philadelphia. New York. Grid plan. 8

Late 19 th century to present Ildefons Cerdà defined a concept of urban planning, based on the grid, that he applied to the Barcelona Eixample. Grid plan. 9 Design elements: a) a very large block measuring 113m by 113m. b) square blocks with truncated corners. c) Major roads perpendicular and diagonal measuring 50 m in width.

Benefits and criticisms Financial cost: - is generally higher than for patterns with discontinuous streets Grid plan maximizes the use of the land - affect street frequency

Pedestrian and bicycle movement. Grid plan. 11 Frequent intersections and orthogonal geometry. The grid plan form a network of streets more understandable to visitors city. Frequency of intersectionsdisadvantage is more difficult for people with physical limitations, children and seniors. For bicycles this disadvantage is accentuated as their normal speed is at least double that of pedestrians. Intersections are not only unpleasant but also dangerous.

Safety A 2009 study suggests that land use patterns play a significant role in traffic safety and should be considered in conjunction with the network pattern. The four-way intersectionsIncrease total accidents significantly The grid plan can cause steep inclines since the topology of the land is not taken into account. 12 Grid plan.

Reconstruction and development Grid plan. 13 Their lack of specialization Grid plans are found in linear settlements Latin America, still successfully retain their grid plans. United States and Canada reintroducing grid patterns to many cities and towns.