What is ITS?

An Introduction to Intelligent Transport Systems

23rd June 2026 - Alistair Gollop for ITS Now

How Intelligent Transport Systems Shape Modern Mobility*

Intelligent Transport Systems (ITS) are the digital intelligence, sensing, connectivity and automation layers that help transport networks function smoothly, safely and sustainably. They sit behind the scenes of everyday journeys, orchestrating the movement of people and goods across roads, railways, cycleways, footways, waterways and airspace. If transport infrastructure is the body, ITS is the nervous system, sensing, analysing, communicating and responding in real time.

For years, ITS was often associated just with highways (traffic signals, variable message signs, CCTV, incident detection and control centres), and although those remain important foundations, the sector has expanded dramatically. Today, ITS spans every mode, every user group and every stage of a journey. It is as relevant to a cyclist navigating a protected lane as it is to a freight operator planning a cross-continental logistics chain. It supports people with mobility, vision or hearing impairments, and it enables cities to manage transport as a single, integrated ecosystem rather than a collection of disconnected modes.

In short, ITS is not just about roads, it’s about mobility.

The Core Purposes of ITS

Across all modes, ITS systems are designed to deliver four fundamental outcomes:

Improve Safety — reducing collisions, protecting vulnerable users and supporting better decision-making.
Increase Capacity — enabling networks to carry more people and goods without building more infrastructure.
Inform Users — providing real-time, accurate information to help people plan and adapt their journeys.
Manage Assets — monitoring, maintaining and optimising infrastructure to extend its life and improve performance.

These principles underpin everything from traffic signals to digital twins.

A Broader, More Inclusive Vision of ITS

Active Travel: Walking, Cycling and Rolling

Active transport has become a central pillar of modern mobility strategies and ITS is increasingly woven into its fabric.

Smart cycleways using embedded sensors, radar and computer vision to detect riders, manage priority at junctions and monitor safety risks.
Pedestrian analytics that help cities understand footfall, accessibility barriers and crossing behaviour.
Adaptive signal control that can prioritise cyclists or extend green time for slower pedestrians, wheelchair users or groups with mobility impairments.
Wayfinding apps offering step-free routing, tactile guidance, audio navigation and real-time alerts for people with visual or hearing impairments.

These systems shift ITS from vehicle-centric to people-centric, ensuring that technology supports healthier, more sustainable and more equitable travel choices.

Micro-Mobility: Small Vehicles, Big Impact

E-scooters, e-bikes, cargo bikes and other lightweight electric vehicles have become essential components of urban mobility. ITS provides the digital infrastructure that keeps these services safe, reliable and integrated.

Geofencing to manage speed, no-ride zones and parking compliance.
Fleet management platforms that balance supply and demand across the city.
Battery and charging analytics to optimise operations and reduce downtime.
Integration with MaaS platforms so users can plan, book and pay for micro-mobility as part of a wider multimodal journey.

Micro-mobility thrives when it is connected, well-managed and seamlessly linked to public transport — all of which rely on ITS.

Accessibility and Inclusive Mobility

Modern ITS recognises that mobility is not one-size-fits-all. Digital tools now help remove barriers for people with disabilities, older adults and anyone who needs additional support.

Real-time accessibility information — lift availability, step-free routes, platform gaps, kerb heights, gradients and tactile paving.
Connected mobility aids — smart canes, haptic navigation devices, wheelchair-mounted sensors and location-aware assistance apps.
Personalised travel assistance — apps that guide users through stations, crossings and interchanges with audio, vibration or visual cues.
Vehicle-to-user communication — alerts from buses, trams or autonomous shuttles to warn of approach, door opening or platform alignment.

This is ITS as an enabler of independence, dignity and confidence.

Connected and Automated Vehicles: The Next Frontier

Connected and automated vehicles (CAVs) are already reshaping how ITS is designed and delivered.

Connected Vehicles

Vehicles that communicate with infrastructure (V2I), other vehicles (V2V), pedestrians and cyclists (V2P), and the wider network (V2X) bring new levels of safety and efficiency.

Collision warnings and blind-spot alerts for drivers, cyclists and pedestrians.
Green Light Optimal Speed Advisory (GLOSA) to reduce stop-start driving.
Real-time hazard alerts for roadworks, weather, breakdowns or vulnerable road users.
Dynamic traffic management informed by live vehicle data.

Automated Vehicles

Automation is emerging across multiple contexts from low-speed shuttles to freight platoons.

Autonomous shuttles providing first- and last-mile connections to public transport.
Automated freight vehicles improving safety and efficiency on logistics corridors.
Robotic delivery systems supporting urban logistics and kerbside management.
Digital twins and simulation tools used to test AV behaviour in complex environments.

CAVs rely on ITS — and in turn, they expand what ITS can achieve.

Road ITS Technologies: The Digital Toolkit Behind Network Operations

Although ITS is now multimodal, road networks still rely on a sophisticated suite of technologies to keep traffic flowing and users safe. These systems work together to deliver the four core ITS outcomes.

Sensing and Detection

Inductive loops, radar, lidar and video analytics to measure flow, speed, occupancy and incidents.
Automatic Incident Detection (AID) to identify stopped vehicles, debris or abnormal behaviour.
Weather and environmental sensors monitoring visibility, surface conditions and air quality.

Control and Management

Urban Traffic Control (UTC) systems coordinating signals across corridors and cities.
Ramp metering to regulate motorway entry and smooth flow.
Variable speed limits and dynamic lane control to manage congestion and incidents.
Managed motorways / smart motorways integrating multiple tools for active network management.

Information and Communication

Variable Message Signs (VMS) providing real-time warnings and journey information.
In-vehicle messaging via connected vehicle platforms.
Traveller information services through apps, websites, social media and voice assistants.

Enforcement and Compliance

Safety cameras for speed, red-light and lane enforcement.
Bus lane and clean air zone enforcement supporting policy and behaviour change.
Weigh-in-motion systems protecting infrastructure from overloaded vehicles.

Asset Management

Condition monitoring for signs, signals, gantries and pavements.
Predictive maintenance using sensor data and analytics.
Digital asset inventories supporting lifecycle planning and investment decisions.

These technologies form the operational backbone of modern road networks but increasingly, they are integrated with public transport, freight, active travel and micro-mobility systems to create a unified mobility ecosystem.

Public Transport: The Digital Backbone of Seamless Journeys

Public transport has long been a core ITS domain, but the sophistication of systems has grown rapidly.

Real-time passenger information delivered through apps, displays, wearables and voice assistants.
Predictive analytics to forecast crowding, optimise timetables and improve reliability.
Integrated ticketing and payments enabling effortless movement between bus, tram, metro, rail, bike share and micro-mobility.
Transit signal priority that reduces delays and improves punctuality.
Digital twins of networks enabling operators to simulate disruptions and plan for resilience.

ITS turns public transport into a coherent, responsive, user-centred service rather than a set of isolated modes.

Freight and Logistics: Smarter, Cleaner, More Efficient

Freight is undergoing its own digital transformation, driven by ITS technologies that enhance safety, efficiency and sustainability.

Connected freight corridors sharing data on delays, incidents, weather and border conditions.
Smart loading zones managing kerbside access dynamically.
Fleet telematics and predictive maintenance improving reliability.
Digital freight platforms matching loads to vehicles and reducing empty running.
Automated and electric freight vehicles supported by V2X connectivity and intelligent charging infrastructure.

ITS helps freight operators deliver goods faster, cleaner and with greater certainty.

Rail, Aviation and Maritime: ITS Beyond the Road

ITS is increasingly multimodal, with digital systems transforming other transport sectors:

Rail

ETCS and digital signalling improving capacity and safety.
Condition-based monitoring predicting faults before they occur.
Passenger information systems integrating rail with local transport and active travel.

Aviation

Airport collaborative decision-making (A-CDM) synchronising airlines, ground handlers and air traffic control.
Smart security and passenger flow analytics reducing queues.
Digital apron management optimising aircraft turnaround.

Maritime

Port community systems streamlining customs and vessel movements.
Smart navigation and e-navigation tools enhancing safety.
Environmental monitoring supporting cleaner port operations.

Across all modes, ITS provides the data, connectivity and automation that keep complex systems running smoothly.

The Power of Integration: ITS as a System-of-Systems

The real promise of ITS lies in its ability to connect everything, across modes, operators, infrastructure, vehicles and users.

Mobility as a Service (MaaS) platforms unifying planning, booking and payment.
Citywide mobility management coordinating traffic, public transport, micro-mobility, freight and events.
Open data ecosystems enabling innovation and transparency.
Digital twins of cities and networks providing a shared operational picture.
V2X connectivity linking vehicles, infrastructure, pedestrians and cyclists.

ITS is evolving from a collection of technologies into a cohesive mobility operating system.

A Living, Evolving Field

Intelligent Transport Systems continue to expand as new technologies emerge, AI, automation, robotics, digital twins, quantum-safe communications, edge computing, satellite navigation upgrades and more. The sector is dynamic, interdisciplinary and increasingly central to how societies function.

The question “What is ITS?” will keep evolving. But at its heart, ITS is the fusion of technology, data and design to create mobility systems that work better for everyone.