This paper outlines the design requirements of a GPS car navigation system for the elderly and the young by proposing a set of new guidelines for designing such systems. Our study revealed that younger drivers had a more positive user experience as compared to the elderly drivers. This paper also identifies a number of advanced features that a routing system should have for satisfying both the elderly and younger drivers on road. In conclusion, we will discuss the key design recommendations that were derived from the study. Categories and Subject Descriptors H.5.2: User Interfaces – user centered design, prototyping, evaluation/methodology General Terms Design, Experimentation, Human Factors. Keywords Elderly, GPS navigation system, Young, User experience