Step 1: About URDPFI Guidelines 2015.
The Urban and Regional Development Plans Formulation and Implementation (URDPFI) Guidelines (2015) were issued by the Government of India to provide planning norms for towns and cities. They cover aspects like population density, land use distribution, infrastructure standards, and environmental considerations.
Step 2: Planning for hill towns.
Hill towns face unique challenges such as:
- Steep terrain restricting construction area.
- Higher cost of infrastructure due to difficult topography.
- Limited carrying capacity of natural resources (like water, slope stability).
Thus, the planning guidelines recommend a lower density for hill areas as compared to plains or metropolitan cities.
Step 3: Recommended density values.
According to URDPFI (2015), the gross density suggested for small hill towns is 45–75 persons per hectare. This ensures balanced growth while keeping in mind ecological sensitivity.
\[
\boxed{45-75 \ \text{persons per hectare}}
\]
% Quicktip
Match the urban form/structure in Group I with their respective proponents in Group II. 
Match the examples in Group I with their corresponding typologies in Group II.

Match the proponents in Group I with the corresponding theories in Group II.
\[\begin{array}{|c|l|c|l|} \hline \textbf{Group I} & & \textbf{Group II} & \\ \hline \text{(P)} & \text{James Q Wilson and George Kelling} & \text{(1)} & \text{Creative Class} \\ \hline \hline \text{(Q)} & \text{Sherry Arnstein} & \text{(2)} & \text{Right to City} \\ \hline \hline \text{(R)} & \text{Henry Lefebvre} & \text{(3)} & \text{Drive-in Culture} \\ \hline \hline \text{(S)} & \text{Richard Florida} & \text{(4)} & \text{Ladder of Citizen Participation} \\ \hline \hline & & \text{(5)} & \text{Broken Window} \\ \hline \end{array}\]
Match the Artists/Scientists in Group I with their corresponding contributions in Group II.

| Group I | Group II |
| (P) Landfill site | (1) Development on previously developed site |
| (Q) Greenfield development | (2) Land to dispose solid waste |
| (R) Green Belt | (3) Development on previously undeveloped land |
| (S) Policy to protect | (4) livestock |
| (5) A buffer to control urban development |
As per URDPFI Guidelines (2015), match the following settlement types in Group-I to their population range in Group-II.
\[ \begin{array}{|c|c|} \hline \textbf{Group I} & \textbf{Group II} \\ \hline (P)\ \text{Large city} & (1)\ 50,000 \text{ to } 1 \,\text{lakh} \\ (Q)\ \text{Metropolitan city II} & (2)\ 50 \,\text{lakh to } 1 \,\text{crore} \\ (R)\ \text{Small town II} & (3)\ 20,000 \text{ to } 50,000 \\ (S)\ \text{Medium town I} & (4)\ \text{More than 1 crore} \\ & (5)\ 5 \,\text{lakh to } 10 \,\text{lakh} \\ \hline \end{array} \]
