Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. PTAL stands for Public Transport Accessibility Level. It is a method sometimes used in United Kingdom transport planning to assess the access level of geographical areas to public transport. PTAL is a simple, easily calculated approach that hinges on the distance from any point to the nearest public transport stop, and service frequency at those stops. The result is a grade from 1-6 (including sub-divisions 1a, 1b, 6a and 6b), where a PTAL of 1a indicates extremely poor access to the location by public transport, and a PTAL of 6b indicates excellent access by public transport. The PTAL calculation was originally developed by the London Borough of Hammersmith and Fulham, and was later adopted by Transport for London as the standard method for calculation of public transport access in London. It is not commonly used outside Greater London or the south east of England.

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