Page 32 - TT Aug-Sept pdf for digital

ITS

Transport Modelling

– an aid to planning and prevention

Defined as the digital replica of the real-world multi-modal transport system, a
digital playground of sorts to assess the impact of various transportation options
and identify how they are likely to perform in the future, the transport model is a
powerful tool for enabling decision-making based on what-if analysis and scenario
planning. Rajesh Krishnan, CEO, ITS Planners & Engineers, elaborates on the
different levels of developing a model, wide range of applications, and the benefits
in terms of enabling authorities to take right traffic management measures.

he development of a model collected for the base model. Once for strategic modelling. In contrast,
involves setting up a base calibrated and verified, this model is microscopic models simulate the
model which reproduces then used by different applications movement of individual vehicles with
the mobility in the planning to develop test scenarios. their acceleration, deceleration and
regions at a given time, the precise movements along links and
T base year. It is built from Depending on the level of detailing intersections and traffic signal states.
various data sources all relating to required, transport models are Mesoscopic models combine
created at four levels of granularity
the same year. By adjusting various – macroscopic, mesoscopic, aspects of both, by simulating
parameters and inputs, the model microscopic and sub-microscopic. traffic in large scale networks
is calibrated to match traffic counts Macroscopic models deal with through simplified vehicle
and survey data, such as number aggregate quantities such as traffic movement models which omit
and type of vehicles, public transit flows at link levels and are typically aspects like acceleration or
passenger boardings, trip distance used to assess traffic in large scale deceleration and sometimes
distributions etc., which are also networks at the expense of detail simulating vehicle movements over

32 TRAFFICINFRATECH / August-September 2024 / www.trafficinfratech.com