Read the following excerpts regarding the intersection of public health and urban planning:
Excerpt 1: "Cities designed with pedestrian-friendly infrastructure encourage healthier lifestyles. Access to parks and walkable neighborhoods correlates with higher physical activity levels among residents."
Excerpt 2: "Conversely, urban sprawl, characterized by car-dependent communities, is linked to increased rates of obesity and lifestyle-related diseases. Communities must prioritize public health in their planning to combat these issues."
Based on the information provided in the excerpts, what is the most effective integration of these sources to support a further discussion on urban planning policies?