  Head Up Displays (HUDs) were designed originally to present at the usual
viewpoints of the pilot the main sensor data during aircraft missions, because
of placing instrument information in the forward field of view enhances pilots
ability to utilize both instrument and environmental information
simultaneously. The first civilian motor vehicle had a monochrome HUD that was
released in 1988 by General Motors as a technological improvement of HeadDown
Display (HDD) interface, which is commonly used in automobile industry. The HUD
reduces the number and duration of the drivers sight deviations from the road,
by projecting the required information directly into the drivers line of
vision. There are many studies about ways of presenting the information:
standard oneearpiece presentation, threedimensional audio presentation, visual
only or audiovisual presentation. Results have shown that using a 3D auditory
display the time of acquiring targets is approximately 2.2 seconds faster than
using a oneearpiece way. Nevertheless, a disadvantage is when the drivers
attention unconsciously shifts away from the road and goes focused on
processing the information presented by the HUD. By this reason, the time, the
way and the channel are important to represent the information on a HUD. A
solution is a context aware multimodal proactive recommended system that
features personalized content combined with the use of car sensors to determine
when the information has to be presented.
