Table of Contents

7.5.2 Information Delivery Channels

Road users require information at a number of identifiable space-time windows, or decision points. For regular commuters, it may be before departing home or work, to know that traffic conditions are not abnormal. For unfamiliar travellers, it may be preferred routes, traffic information, roadworks in progress and other information to plan their trip. Such information can be described as ‘static’ information. When conditions change, as a result of incidents, unplanned events or abnormal congestion then, for both familiar and unfamiliar road users, a varying degree of ‘dynamic’, prescriptive and predictive information is required.

A range of different delivery channels are required to deliver information to meet the range of needs described above. Table 7.4 shows the channels available to disseminate information to road users. Those more commonly used in Australia and New Zealand are further discussed in succeeding sections.

Table 7.4: Information delivery channels

InformationSystemVisual disseminationAudio dissemination


Electronic bulletin board

Videotext, kiosk, email

Internet broadcasts
TelephoneInternet phone (GPRS and 3G phones)

Traveller advisory telephone service


Mobile phone (call centre, voice and SMS)

Television, radio

Free to air, teletext

Cable, interactive

Radio broadcast
En routeIn-vehicle systems

In-vehicle navigation


Radio broadcast

Hands-free mobile phone

Automated announcement systems (public transport)

Roadside information systems


Static road signage

Travel time signs

Variable message signs (VMS)

Personal based systems

Personal digital assistants (PDAs)

Pagers, mobile phones (SMS, WAP, GPRS)

Mobile phone