SOS SYSTEM FOR MOTORWAYS Russian patent published in 2002 - IPC

FIELD: safety and rescue facilities for high-density traffic conditions on motorways. SUBSTANCE: energy conversion section of system is arranged in transparent pressurized housing and is oriented to the Sun or to most illuminated part of the sky by means of synchro motors and photodiodes with cylindrical reflectors depending for their operation on equisignal zone principle. Separate SOS systems are installed on motorway divider- barrier and spaced 0.8 to 1 km apart; they are accessible for drivers on both traffic lines of motorway. EFFECT: reduced space requirement and cost, provision for all-weather service. 2 dwg