City block

A city block is a small space.

It is a group of buildings. Streets go all around it. Some blocks are shaped like squares. Others are long like a rectangle.

In many cities, blocks follow a grid. This means streets cross in straight lines. This makes the blocks look very neat.

Some blocks have buildings on the edge. These buildings can surround a small yard. This is called a perimeter block.

Some blocks are very big. These are called superblocks. They can hold many small blocks inside.

People use the word block to talk about distance. You might say a shop is three blocks away. It is a part of every city.

A city block is a small group of buildings.

Streets go all around these buildings. They are the basic parts of a city.

Most cities have different shapes for their blocks. Some cities use a grid plan. This means streets cross in straight lines. This makes blocks look like squares or rectangles. In Chicago, a block is a way to measure distance. Sixteen blocks going east to west make one mile. In many parts of North America, blocks help with addresses. Each block gets 100 building numbers.

Some blocks are built in a special way. A perimeter block has buildings along the outside edge. These buildings can surround a private yard in the middle.

This style is common in many European cities.

There are also superblocks. These are very large areas. They are bounded by big roads. A superblock can hold many smaller city blocks inside it. This type of layout is common in Japan and China. You might also hear people use the word "block" to talk about distance. They might say a place is three blocks away.

A city block is a small group of buildings.

It is the smallest group of buildings surrounded by streets. These blocks form the basic fabric of a city. You can think of them as the containers for public spaces. Most cities have many different shapes and sizes of blocks. Some blocks are very regular and easy to follow. Other blocks might be shaped in strange or uneven ways.

Many cities use a grid plan to organize their streets. In a grid, streets cross each other in straight lines. This creates blocks that look like squares or rectangles. Some developers use a style called a perimeter block. In this design, buildings sit along the outside edge of the block. The entrances face the street to meet people passing by. This leaves a quiet, semi-private courtyard in the middle.

History shows us that cities grow in different ways. Many old cities in Europe or Asia grew slowly over time. These cities often have irregular street patterns instead of grids. However, some cities were planned from the very start. For example, New York City used the Commissioners' Plan of 1811. This plan created an extensive grid for the city. Some cities like Turin, Italy, kept their grid from Roman times.

Different cities have very specific measurements for their blocks. In Manhattan, the standard block is about 264 feet long. Chicago uses a different system for its street grid. In Chicago, sixteen east-west blocks make one mile. You can also measure eight north-south blocks to make one mile. Many places in the United States and Canada use blocks for addresses. Each block of a street is given 100 building numbers.

Sometimes, planners create much larger areas called superblocks. A superblock is a large area bounded by big arterial roads. It can contain many smaller city blocks inside of it. This type of layout is very common in Japan and China. In Barcelona, they use a version called superilles. These areas slow down traffic to keep the streets safe. You might also use the word "block" to talk about distance. Someone might say a shop is three blocks away.

A city block is the smallest group of buildings surrounded by streets.

In urban design, it is a fundamental unit of a city's urban fabric. These blocks serve as physical containers for public spaces, often called streetwalls. While blocks can be subdivided into many smaller land lots, they remain the basic building blocks of a city. Most cities are composed of a variety of different block sizes and shapes.

There are different ways to organize these structures. Many cities in the New World use a grid plan. This plan uses square or rectangular blocks arranged in a regular pattern. One common method is the perimeter block development principle. In this system, buildings are located along the outer edge of the block. The entrances face the street to interact with the public. This leaves a semi-private courtyard in the rear of the buildings.

Urban planners also use different models to define blocks. One method is the "block with sidewalks" model. This uses a direct geometric representation of the block. It includes sub-structures like sidewalks, inner alleys, and common gardens.

Another method is the "block without sidewalks" model. This is a polygon formed by the outer border of touching land lots. The difference between these two models contains the sidewalks and alleys. This shows how different layers make up a single block.

Some cities use even larger areas called superblocks. A superblock is an area of urban land bounded by arterial roads. It is much larger than a typical city block. It can contain many standard blocks within it. Inside a superblock, the local road network serves only local needs. This morphology is very common in Japan and China. In these areas, a "supergrid" of wide roads defines a series of cells. Each cell is a superblock containing its own network of narrower streets.

Barcelona uses a specific version of this called superilles. These are superblocks that have been retroactively applied to an existing grid. Each superilla contains nine city blocks. To make them safer, traffic rules are changed on the internal roads. Speed limits are slowed to 10 km/h. Through traffic is disallowed in these areas. This makes the internal streets more focused on local movement.

History shows how different city layouts began. Many old cities in Europe, Asia, and the Middle East grew through accretion. This means they grew gradually over a long time. Because of this, they often have irregular street patterns. However, some cities were planned from the start. New York City adopted the Commissioners' Plan of 1811 to create an extensive grid. Some cities, like Turin in Italy, kept their grid from Roman military settlements. Cities like Frankfurt also have grids due to being rebuilt after World War II.

Block sizes vary greatly depending on the location. There is no single standard dimension for a city block. In Manhattan, the standard block is about 264 feet long. Chicago uses a specific system for its grid. In Chicago, sixteen east-west blocks or eight north-south blocks measure one mile. This system has been adopted by other cities in the United States. In much of the U.S. and Canada, addresses follow a block and lot number system. Each block of a street is allotted 100 building numbers.

Finally, the word "block" is often used as an informal unit of distance. In North American and Australian English, people use it to give directions. Someone might say a destination is "three blocks from here." This can mean the literal distance in a grid or an equivalent distance. Because block lengths vary, using them as a measurement for feet or meters can be imprecise. It is a relative way to describe how far one must travel.