Glossary

PACE

Police and Criminal Evidence Act 1984

PACTS

Parliamentary Advisory Council for Transport Safety

PCAW

Public Concern at Work

PDAC

Performance Data Accuracy Code : Establishes the standard of recording of the times at which trains arrive at, depart from or pass specified points, and the difference between those times and the corresponding times published in the Working Timetable.

Performance order

Directs a party in breach of contract to do, or refrain from doing, anything that the arbitral tribunal making the order considers just and reasonable in the circumstances.

Permitted business

Permitted business means the Network Business and the Permitted Non-Network Business.

Phase 1 Changes

Changes to the Network code as a result of the industry consultation period of 2003/2004.

PIM

The Train Accident Precursor Indicator Model (the PIM) managed by the Rail Safety and Standards Board (RSSB), measures the risk, per million train miles, of a train accident - i.e. collision, derailment, fire or striking a road vehicle on a level crossing. The measure incorporates 82 precursor events in eight groups. Around 65% of the risk arises from events largely under the control or the responsibility of Network Rail, e.g. track geometry, infrastructure failures, environmental factors (flooding, land slips etc.) and level crossing misuse.

The PIM risk indicator was set to a reference value of 100 at the end of March 2002 and the PIM risk indicator provides a measure of the change in risk relative to this level. A reduction in the index is therefore beneficial, denoting a reduction in risk.

Points failure

A fault within a set of points (switches and crossings).

PPM

PPM is the percentage of franchised passenger trains arriving at their destination, having made all booked calls, and within a specified lateness margin (typically five or ten minutes for some long-distance services).

PSRs

Permanent speed restrictions

PTA

Passenger Transport Authority: body responsible for setting out a local authority's transport policy and expenditure plans to be allocated for public transport.

PTEs

Passenger Transport Executives: bodies throughout Great Britain charged with helping to integrate the use of public transport services, by ensuring that they meet the public’s needs and contribute to the wider social, economic and environmental wellbeing of local communities.

PUWER

Provision and Use of Work Equipment Regulations 1992