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# Path Impact Assessment (PIA)

Consider the consequences of a decision clearly

On hot days, an urban square is almost empty. Old trees give shade, but their roots make some routes difficult. A new canopy could help quickly; a company offers to pay if it can use part of the square for events. Which plan keeps the square accessible and liveable over time? The PIA follows a proposed decision from the present situation to its possible effects.

## Three questions every PIA must ask

### 1 · Which paths become stronger, and which become weaker?
Consider each affected path separately. Older residents need reachable shade, trees need soil and water, and the city needs reliable care. Who can shape future use? Which relations become stronger? What can continue and develop? Record gains and losses before choosing a solution.

### 2 · Which foundations shared by other paths are affected?
Many possibilities depend on a few shared conditions: accessible routes, water, maintenance and public access. Path ethics calls such supporting developments infrastructure paths. If one fails, several others may be harmed. A plan should state who maintains them and what alternatives exist.

### 3 · Which effects can be corrected?
A bench can be moved later. A mature tree cannot simply be restored after it is cut down. This difference is called reversibility. Trial changes may be suitable for seating. Permanent interventions require stronger reasons and better knowledge beforehand.

## When outward continuity is misleading

After rebuilding, the square might look tidy and keep its old name while public use is limited to a few times. Its outer form continues, but the capacities that made it a public place have weakened. A persistence illusion occurs when these two things are treated as the same.

## First examine the present path

An impact assessment needs a reasoned description of the affected paths. The assessment guide helps build that profile.

[Open the assessment guide](undefined)

## Complete version

The longer version with application examples is available in the download section.

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Path Impact Assessment (PIA)

Consider the consequences of a decision clearly

On hot days, an urban square is almost empty. Old trees give shade, but their roots make some routes difficult. A new canopy could help quickly; a company offers to pay if it can use part of the square for events. Which plan keeps the square accessible and liveable over time? The PIA follows a proposed decision from the present situation to its possible effects.

Three questions every PIA must ask

1 · Which paths become stronger, and which become weaker?

Consider each affected path separately. Older residents need reachable shade, trees need soil and water, and the city needs reliable care. Who can shape future use? Which relations become stronger? What can continue and develop? Record gains and losses before choosing a solution.

2 · Which foundations shared by other paths are affected?

Many possibilities depend on a few shared conditions: accessible routes, water, maintenance and public access. Path ethics calls such supporting developments infrastructure paths. If one fails, several others may be harmed. A plan should state who maintains them and what alternatives exist.

3 · Which effects can be corrected?

A bench can be moved later. A mature tree cannot simply be restored after it is cut down. This difference is called reversibility. Trial changes may be suitable for seating. Permanent interventions require stronger reasons and better knowledge beforehand.

When outward continuity is misleading

After rebuilding, the square might look tidy and keep its old name while public use is limited to a few times. Its outer form continues, but the capacities that made it a public place have weakened. A persistence illusion occurs when these two things are treated as the same.

First examine the present path

An impact assessment needs a reasoned description of the affected paths. The assessment guide helps build that profile.

[Open the assessment guide](undefined)

Complete version

The longer version with application examples is available in the download section.