4. Network Analysis: The figure shows the flow of traffic (in vehicles per hour) through a network of streets. Solve this system for xi = 1, 2, 3, 4. 200 100 - 100 200

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### Network Analysis: Traffic Flow through a Network of Streets

The following exercise involves analyzing and solving the flow of traffic through a network of streets, specifically depicted in the figure below. The flow is measured as vehicles per hour.

#### Problem Description
The diagram represents a simplified model of a traffic network, comprising four nodes denoted as \( x_1, x_2, x_3, \) and \( x_4 \). The arrows along the network indicate the directions and magnitudes of traffic flow entering and exiting each node.

#### Structure of the Network
The network consists of:
- Four nodes \( x_1 \), \( x_2 \), \( x_3 \), and \( x_4 \).
- Traffic entering the network:
  - 200 vehicles per hour into node \( x_1 \)
  - 100 vehicles per hour into node \( x_3 \)
- Traffic exiting the network:
  - 100 vehicles per hour from node \( x_2 \)
  - 200 vehicles per hour from node \( x_4 \)

#### Objective
Solve this system for the variables \( x_i \) where \( i = 1, 2, 3, 4 \), representing the flow through each part of the network.

#### Diagram Description
The network diagram shows:
- Nodes \( x_1 \), \( x_2 \), \( x_3 \), and \( x_4 \) arranged in a clockwise loop.
- Arrows indicating the sides between nodes with the respective magnitudes (either entering or exiting the network).

To solve this network flow problem, you have to set up and solve a system of linear equations derived from the traffic inflow and outflow constraints at each node.

#### System of Equations
To find the unknown traffic flows \( x_1, x_2, x_3, x_4 \), use the given traffic rates and set up appropriate equations considering the conservation of flow at each node.

For educational purposes, this type of problem is often used to demonstrate concepts in network theory, linear algebra, and systems of equations.

**Note:** Further steps would include setting up the precise mathematical equations but the image provides information about the graphical representation only.
Transcribed Image Text:### Network Analysis: Traffic Flow through a Network of Streets The following exercise involves analyzing and solving the flow of traffic through a network of streets, specifically depicted in the figure below. The flow is measured as vehicles per hour. #### Problem Description The diagram represents a simplified model of a traffic network, comprising four nodes denoted as \( x_1, x_2, x_3, \) and \( x_4 \). The arrows along the network indicate the directions and magnitudes of traffic flow entering and exiting each node. #### Structure of the Network The network consists of: - Four nodes \( x_1 \), \( x_2 \), \( x_3 \), and \( x_4 \). - Traffic entering the network: - 200 vehicles per hour into node \( x_1 \) - 100 vehicles per hour into node \( x_3 \) - Traffic exiting the network: - 100 vehicles per hour from node \( x_2 \) - 200 vehicles per hour from node \( x_4 \) #### Objective Solve this system for the variables \( x_i \) where \( i = 1, 2, 3, 4 \), representing the flow through each part of the network. #### Diagram Description The network diagram shows: - Nodes \( x_1 \), \( x_2 \), \( x_3 \), and \( x_4 \) arranged in a clockwise loop. - Arrows indicating the sides between nodes with the respective magnitudes (either entering or exiting the network). To solve this network flow problem, you have to set up and solve a system of linear equations derived from the traffic inflow and outflow constraints at each node. #### System of Equations To find the unknown traffic flows \( x_1, x_2, x_3, x_4 \), use the given traffic rates and set up appropriate equations considering the conservation of flow at each node. For educational purposes, this type of problem is often used to demonstrate concepts in network theory, linear algebra, and systems of equations. **Note:** Further steps would include setting up the precise mathematical equations but the image provides information about the graphical representation only.
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