Question

Lowry's model of Metropolis (1964) includes two \underline{\hspace{2cm}} spatial interaction models.

• A. Singly constrained
• B. Doubly constrained
• C. Unconstrained
• D. Triply constrained

Hint:

In spatial modeling: - Triply constrained = rare and complex.
- Doubly constrained = most widely used in urban planning models.

Answer 1

The Correct Option is B

Step 1: Overview of Lowry's 1964 Model.
Lowry's model of Metropolis represented a foundational effort in urban planning, establishing a connection between land use and transportation. It models the relationship between employment centers, residential areas, and service centers via a feedback loop.

Step 2: Application of the Gravity Model.
The model employs the gravity interaction principle, which posits that the interaction between zones is directly proportional to their size (e.g., population, employment) and inversely proportional to the distance separating them.

Step 3: Constrained Gravity Models.
- Singly constrained model: This model fixes constraints on only one side of the interaction (either the origin or the destination).
- Doubly constrained model: This model fixes constraints on both origin totals and destination totals, thereby offering a more realistic representation. Lowry's model integrates two doubly constrained spatial interaction models: one for forecasting residential distribution and another for determining service location.

Step 4: Conclusion.
Consequently, the accurate classification is doubly constrained. \[\boxed{\text{Doubly constrained spatial interaction models}}\] % Quicktip