Mott MacDonald is a leading consultant in modelling travel time
reliability. We carried out research for DfT to model how drivers
respond to unreliable travel times which resulted in a new
modelling methodology. We also maintain the INCA model for DfT
which calculates the economic benefits of measures that reduce the
impact of incidents on the reliability of journey times on
motorways. We use microsimulation packages and develop CONTRAM,
both of which can be used to assess variability in travel times and
congestion. In the West Midlands we are responsible for monitoring
the Active Traffic Management project, one of its aims is to
improve journey reliability. We were also responsible for
developing the Journey Time Data Base, a system for accessing
journey times, speeds and flows on a link by link basis across the
UK from 4 different data sources.
Mott MacDonald is also experienced in public transport reliability
modelling and additionally has capability in the provision of
Reliability, Availability and Maintainability (RAM) assessment
services, including:
- Specification of overall RAM requirements for total transport
systems;
- Undertaking apportionment of RAM targets;
- Undertaking RAM assessments for all project phases;
- Developing Failure Reporting and Correction Assessment Systems
(FRACAS);
- Developing and monitoring RAM demonstration tests;
- Analysing results of demonstration tests.
Particular projects include:
- East London Line Extension, SRA - development of railway
performance criteria (capacity, reliability and availability) to be
included in tender documentation. All criteria needed to be
measurable to demonstrate operational achievement of performance
criteria;
- Train Availability Study Hampshire, private client - railway
operations and maintenance engineering input to a study into
seasonal variation in train availability.
