Abstract
A driver's car-following performance may improved by giving him additional information concerning the relative state of a lead car information which is normally below his visual threshold. Here, such information was presented via a kinesthetic-tactile display, or "finger", which are built into the head of the control stick, this control stick being used instead of conventional automobile controls. A describing-function model of the driver-vehicle system was obtained for the aided case. This model relates the lead and following car velocities, and can be used to study queue dynamics for the driver-aided case. It is observed that optimum car following, in the sense of minimized variance, and asymptotic stability de not occur.