AI calculation – changes to public transport services during the assessment

The AI is calculated as part of the design stage transport analysis and its value relates to the site location and to informing transport-related design decisions. This must be based on current information, including any planned and publicly-notified changes at the time the transport assessment is carried out. This should be used as the AI benchmark for the assessment.

Where later, unforeseen changes to public transport availability are implemented before post-construction certification, the AI benchmark should not be updated at post-construction stage.

Assessments should not be disadvantaged by, or benefit from such changes.