| AFB Speed Control The AFB function is similar to the cruise-control function in a road vehicle where a required speed is set by the driver and the vehicle will achieve and maintain that speed by automatically accelerating and braking as needed. To use the AFB function, push the lever to the left of the throttle forward to set the required speed, denoted by the bug around the outside of the speedometer. Acceleration is controlled by the throttle lever, so the lower this is set, the longer it will take to attain the set cruise speed. If the brake lever is in the hold position (notch 2) the train air brakes will be applied in addition to dynamic braking if necessary. The driver retains complete control of braking and acceleration while the function is active. To deactivate the function, pull the AFB lever fully back. SIFA Driver Vigilance If the stop signal ahead is red then passing a 500hz balise will cause the 85 and 500 lights to be displayed steady. If the train speed exceeds 65km/h at this point the emergency brakes will be immediately applied. If not, you have 153m to reduce speed to below 45km/h, or again the emergency brakes will be applied. If train speed drops below 10km/h while 500hz 45km/h monitoring is active then the maximum monitored speed will be reduced to 25km/h. This is indicated by 70 and 85 flashing alternately together with the 500hz lit. Speed monitoring cannot be released while the 500hz light is on. It is extinguished, and the 500hz monitoring expired, 250m after passing the 500hz balise, which should be approximately the position of the associated stop signal. If an adverse stop signal is passed (2000hz balise) the emergency brakes will immediately be applied. Click X to Continue