This research examined four touchscreen methods for entering a destination into a route guidance system. Three of the interfaces were character entry-based, including 1) a method using a sequence of two buttons for each alphanumeric entry (referred to as doublepress), 2) a Qwerty-style keypad layout, and 3) a Phone-based keypad where letters were entered using their corresponding number key. The fourth interface provided an alphabetic list through which a user scrolled to select a city or street name. Sixteen subjects used each of the interfaces to enter destinations in a laboratory experiment while "parked" and while driving a simulator. The entry methods were evaluated based on entry time, driving performance, errors, preferences, and perceived difficulty. Overall, address entry times were shortest for the phonepad (43 seconds) and Qwerty (45 seconds) methods, followed by the scrolling list (56 seconds) and doublepress (75 seconds) methods. Entry time was significantly affected by driver age, with older drivers taking about 20% more time. Driving performance (deviation of lane position) was significantly worse when entering a destination as compared with baseline driving performance. Participants rated the difficulty of destination entry only slightly greater than that of conventional driving tasks. According to the subjective data, there was no preferred entry method.

  • Supplemental Notes:
    • This research was originally conducted as a master's thesis (by Gretchen Paelke) at the University of Michigan in the Department of Industrial and Operations Engineering. Sponsored by Conger Alumnae Group, Ann Arbor, Michigan.
  • Corporate Authors:

    University of Michigan Transportation Research Institute

    2901 Baxter Road
    Ann Arbor, MI  United States  48109-2150
  • Authors:
    • Paelke, G
    • Green, P
  • Publication Date: 1993-12


  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 76 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00719357
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: UMTRI-93-45, HS-041 869
  • Files: HSL, TRIS, USDOT
  • Created Date: Mar 4 1996 12:00AM