|1.||The available attention diversion time is about 1-2 sec.|
|2.||The operation of user controls should be completed within 1-2 sec.|
|3.||Legibility and comprehension of displayed information:|
|4.||Human interface specifications for voice guidance and their effectiveness:|
ANSI/HFS 100-1988, American National Standards for Human Factors Engineering of Visual Display Terminal Workstations.
Freundschuh S. M. ( 1989). Does "anybody" really want (or need) vehicle navigation aids? 1989 IEEE, 439-442.