PTAL: a measure which rates locations by distance from frequent public transport services.

We use WebCAT to provide information on London's transport system to the professional planning community. This connectivity assessment toolkit allows planners to measure public transport access levels (PTAL) and to produce travel time reports.

In this chapter we introduce the PTAL measure. We explain what PTAL is, bring various examples for its role in the planning process, and also explain where PTAL values can be found. For readers who are interested in the full process used to calculate PTAL values, the chapter also includes a description of the calculation method. 2.2 What is PTAL?

You can click anywhere on the map to change the selected location. ... Select: Access level (PTAL) Time mapping (TIM) TIM: a new measure, looking at how far you can travel in a given journey time. Map key - Travel Time < 15 mins 15 - 30 mins 30 - 45 mins 45 - 60 mins 60 - 75 mins 75 - 90 mins 90 - 105 mins

The PTAL default display shows base year data for the whole of London. If you chose TIM but have not yet selected a location, a grey scale map is displayed. The default TIM travel time output is for the base year network, using all public transport modes and for the morning peak time period. Travel time selection

The PTAL grid. PTAL values are provided for a grid of points at 100 meter intervals, covering the whole of London. The concept of presenting PTAL values for grid points is explained in detail in the guide on the Planning with WebCAT page.

PTAL: Public Transport Access Level is a measure of access to the public transport network. For any given point in London, PTALs combine walk times from a chosen point to the network (stations and bus stops, for example) together with service frequency data at these locations.

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Title: Public Transport Access Levels - City of London Author: Transport for London Subject: Public Transport Access Levels Keywords: Public Transport Access Levels; PTAL; Connectivity; City of London

Title: Public Transport Access Levels - Tower Hamlets Author: Transport for London Subject: Public Transport Access Levels Keywords: Public Transport Access Levels; PTAL; Connectivity; Tower Hamlets