We have recently witnessed the emergence of ai range of naturalistic studie
s concerned with work, interaction and technology in complex organisational
environments. In this paper we examine a seemingly individual and isolated
activity, which involves the use of relatively basic technology to guide a
vehicle in accord with a highly regulated signalling system. The paper con
siders the ways in which operating a vehicle is systematically co-ordinated
with the actions off others. These actions, whether by passengers or colle
agues, are only 'visible' by virtue of various technologies; technologies t
hat offer restricted and even distorted access to people and their conduct.
In one sense, therefore, the essay is concerned with explicating the socia
lly organised and interactionally sensitive 'intelligence' which features i
n the day-to-day work of drivers on London Underground; a rapid urban trans
port system which carries more than a million passengers a day.