Table of contents
Chapter 1

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URLs referred to in this chapter
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Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Appendix
Turn-by-turn maps
Graphical display of road-type, applied in route description box
MetroCommute site
Application of oblique views of buildings

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Sites providing information on travelling by car are divided into two categories: Sites offering information on routing and traffic conditions. Routing facilities are offered as a tool under mapping engines like MapQuest. Most often routing facilities do not take into account current traffic conditions. Sites providing data on traffic conditions on the other hand offer time-sensitive information on primarily incidents and traffic density.
Routing facilities offer information on: route definition and description, estimated travel time and distance. Most often information is provided through maps accompanied by text and detail maps where start and destination points are given. These maps are in general not clickable. Sites providing information on traffic density and incidents deal with traffic speed, congestion, volume, construction, closures, accidents and weather conditions. Information on these aspects are provided through web cams, text and maps. This up-to-date information is gathered through a network of video cameras and traffic counters. The information is offered through separate maps or combined into one map. In the latter special techniques are applied to enable the user to turn layers on and off. Information on incidents and traffic density is mostly visualised through symbols that are either non-clickable, interactive or dynamic.
Taking into account user needs improvements encompass functionality, user interface and graphics. Routing facilities should provide more functionality like their CD-ROM counterparts, e.g. measuring distances and changing the look of maps. The interface should be transparent and not too complex. Concerning the graphics, information should be visualised more through maps than text. When considering 'traffic maps' special attention needs to go to the size of a symbol, better usage of visual variables, visual hierarchy, generalisation, legends and map structure. In the latter case most often too many aspects are combined into one map.

Last updated March 26, 2002