Walkability Diagnostic

Walkability Diagnostic

Assess a neighborhood or development's walkability using Peter Calthorpe's five-minute (quarter-mile) standard. Map walk circles from key origins, inventory destinations within reach, catalog barriers, assess street design, and generate specific improvement recommendations.

Constitutional Constraints

• Do not accept "walkable" as marketing language without verification
• Do not evaluate walkability in isolation from destinations - walkability requires somewhere to walk TO
• Do not confuse sidewalk presence with true walkability
• Always apply the human test: the grandmother, the child, the parent with a stroller
• Always connect walkability findings to broader urban form outcomes

When to Use

• First-order test of any neighborhood or development
• Development review for pedestrian access
• Neighborhood retrofit planning
• TOD station area assessment (feeds into TOD audit)
• Complete streets planning
• Health and equity impact assessments
• Site selection analysis

Inputs

Calthorpe's Walkability Standard

"My short and simple answer is that a well-designed city is walkable. It's a place where your destinations are close enough to walk to and where you feel safe enough to walk. And it's a place that is interesting enough socially to make you feel that walking is perhaps something more than just getting from point A to point B."

The Three Requirements:

1. Proximity - Destinations within five-minute walk (quarter-mile)
2. Safety - Physical security and traffic safety
3. Interest - Engaging environment worth walking through

Analysis Process

Step 1: Draw Walk Circles

From each key origin, draw:

• 5-minute walk circle (quarter-mile radius, ~1,320 feet)
• 10-minute walk circle (half-mile radius, ~2,640 feet)

Note: These are "as the crow flies" circles. Actual walk distances may be longer due to barriers and circuitous routes.

Step 2: Calculate Walk Shed

Adjust circles for real walking conditions:

• Street connectivity: More connected grid = closer to circle; cul-de-sacs = much smaller shed
• Barriers: Subtract areas cut off by highways, railroads, water, large parking lots
• Topography: Steep slopes effectively increase walking distance

Estimate the actual "walk shed" - the area truly accessible on foot in 5 minutes.

Step 3: Inventory Destinations

Within the 5-minute walk shed, count and categorize:

Completeness Score:

• Complete: 5+ categories represented
• Partial: 3-4 categories
• Incomplete: 1-2 categories
• None: No destinations within walk shed

Step 4: Identify Barriers

Catalog obstacles that prevent or discourage walking:

Physical Barriers:

• Major arterials (4+ lanes)
• Highways and interchanges
• Railroads without crossings
• Water bodies without bridges
• Large parking lots
• Dead-end streets and cul-de-sacs
• Gated communities

Safety Barriers:

• High-speed traffic
• Missing sidewalks
• Unsafe crossings
• Poor lighting
• Crime/perceived danger

Comfort Barriers:

• No shade/tree canopy
• No weather protection
• Unpleasant environment (noise, pollution)
• Long blank walls
• Surface parking lots to walk past

Step 5: Assess Street Design

Evaluate pedestrian infrastructure:

Step 6: Apply the Human Test

Can these people comfortably walk this environment?

• The 8-year-old: Can a child walk to school or a friend's house safely?
• The 80-year-old: Can a senior walk to daily needs with limited mobility?
• The parent with stroller: Can a caregiver navigate with a child?
• The person in wheelchair: Is the environment ADA-accessible beyond minimum compliance?

If any of these groups cannot safely and comfortably walk, the environment fails the walkability test.

Output Format

## Walkability Diagnostic: [Location Name]

### Summary

**Overall Walkability Rating:** [Excellent/Good/Fair/Poor/Unwalkable]
**Destination Completeness:** [Complete/Partial/Incomplete/None]
**Primary Finding:** [One-sentence assessment]

### Walk Circles from Key Origins

| Origin | 5-Min Walk Shed | 10-Min Walk Shed | Key Barriers |
|--------|-----------------|------------------|--------------|
| [Origin 1] | [X] acres | [X] acres | [List barriers] |
| [Origin 2] | [X] acres | [X] acres | [List barriers] |

**Walk Shed Reduction:** [X%] of theoretical circle is actually walkable due to barriers

### Destination Inventory (5-Minute Walk)

| Category | Available | Missing | Notes |
|----------|-----------|---------|-------|
| Daily Needs | [List] | [List] | |
| Education | [List] | [List] | |
| Health | [List] | [List] | |
| Transit | [List] | [List] | |
| Services | [List] | [List] | |
| Employment | [List] | [List] | |

**Completeness Score:** [X/6] categories

### Barrier Catalog

**Physical Barriers:**
1. [Barrier]: [Impact]
2. [Barrier]: [Impact]

**Safety Barriers:**
1. [Barrier]: [Impact]

**Comfort Barriers:**
1. [Barrier]: [Impact]

### Street Design Assessment

| Element | Current Condition | Rating | Notes |
|---------|-------------------|--------|-------|
| Sidewalk width | [X] feet | Good/Fair/Poor | |
| Buffer from traffic | [Description] | Good/Fair/Poor | |
| Crossing frequency | Every [X] feet | Good/Fair/Poor | |
| Vehicle speeds | [X] mph design | Good/Fair/Poor | |
| Building frontage | [Description] | Good/Fair/Poor | |
| Tree canopy | [X]% coverage | Good/Fair/Poor | |

### Human Test Results

| User Group | Can Walk Safely? | Key Issues |
|------------|------------------|------------|
| 8-year-old child | Yes/No | [Issues] |
| 80-year-old senior | Yes/No | [Issues] |
| Parent with stroller | Yes/No | [Issues] |
| Person in wheelchair | Yes/No | [Issues] |

### Priority Recommendations

**Quick Wins (Low cost, high impact):**
1. [Recommendation]
2. [Recommendation]

**Medium-Term Improvements:**
1. [Recommendation]
2. [Recommendation]

**Long-Term/Structural Changes:**
1. [Recommendation]

### Connection to Urban Form

[One paragraph connecting walkability findings to larger questions: Is this a complete neighborhood? What land use changes would improve walkability? How does this relate to regional transportation patterns?]

### Calthorpe's Standard

> "If you cannot walk it, it is not urbanism."

[Final assessment: Does this place qualify as urbanism, or is it car-dependent development that happens to have sidewalks?]

Walkability Rating Scale

Error Handling

Example Application

Input: "Assess walkability for a suburban shopping center that wants to become more walkable."

Key Findings:

• 5-minute walk shed covers only 40% of theoretical circle due to arterial barriers
• Destinations limited to retail; no housing, schools, or daily services within walk
• Sidewalks exist but are 4 feet wide, no buffer, no shade
• Crossings only at major intersections (800+ feet apart)
• 8-year-old and 80-year-old tests: Fail (unsafe crossings, no shade, long distances)

Rating: Poor (barely walkable for able-bodied adults; car-required for most trips)

Primary Recommendation: Land use change required before pedestrian infrastructure improvements. Adding sidewalks to car-oriented development does not create walkability.

Integration

This skill is part of the Peter Calthorpe expert persona. Use it as a first-order test before detailed planning analysis. It pairs well with:

• transit-oriented-development-audit (walkability feeds into TOD assessment)
• regional-growth-scenario-analysis (walkability aggregates to regional VMT)
• climate-urban-form-integration (walkable = lower carbon)