Abstract
The reported study was designed to determine general driver ability to steer a vehicle while simultaneously searching for a specific sign and to measure the timesharing basis used in performing the two tasks. Four types of analysis were conducted to determine: 1- the influence of constituents of the tracking task upon performance of the search and-recognition task, and 2- the influence of components of the search and-recognition task upon tracking performance. The erroneous recognition of signs presented was examined in the third kind of analysis. The fourth kind of analysis was made of control tests.