A reflection multiplier radio wave marker system which comprises a
plurality of transmit antennas mounted on board a vehicle for transmitting
electric wave signals in a first frequency; a reflection multiplier radio
wave marker installed in the surface of a road, which reflects and
transmits the electric wave signal of first frequency after multiplying it
into an electric wave signal of a second frequency; and a receive antenna
mounted on board the vehicle for receiving the electric wave of second
frequency. The system specifies the location of a vehicle in a traffic
lane by making use of the second frequency electric wave signal reached
from a marker. It can detect a marker throughout substantially the entire
width range of a vehicle. A traffic system using the marker system is also
disclosed. The function of specifying the location of a radio wave marker
is performed throughout the entire vehicle width.
