Bruno Latour, Aramis, or the Love of Technology, PDF - Dss-edit.com

"Here deceleration has to be factored in. The faster you go andthe closer you are, the faster you have to slam on the brakes, but youhave to make sure the guy behind you knows you're slamming on thebrakes. You have to warn himit's like the red brake-lights.To achieve this,-every vehicle always knows the number of the pair of carsahead (target vehicle);-every pair of cars measures its own abscissa in relationto the origin of the sector by count ing the cogs of thephonic security wheel mounted on every right front wheel .This measure is periodically recalibrated through detectionof the recalibration intersect ions, which are evenlyspaced every 2.2 meters;-every pair of cars calculates its own speed on the basisof the count of the number of cogs in the phonic securitywheel;-every pair of cars transmits to the ground (UGT) and tothe rear (through the average distance car-to-car hyperfrequencyliaison) its own position, its speed, its number, andits alarms , if any, in the form of a coded me ssage;-the UGT rebroadcasts the information received to all thepair of cars;-each pair of cars calculates the relative distance(6.x) separating it from the preceding pair through thedif ference between its own abscissa and the abscissa ofthe target (transmitted by the UGT or the hyperfrequencyliaison) ;-each pair of cars calculates a threshold speed correspondingto a safety zone in case of emergency braking;-each pair of cars compares its own real measured speed tothe threshold speed . If the former is higher, the pair ordersan irreversible emergency braking action." [p . 35]ARAMIS AT THE CET STA