Abstract: A buried power supply system for an electric vehicle (17) equipped with collector shoes (16, 22), the system comprising a succession of conductive segments (5A, 5B, 5C) that are electrically isolated from one another, and that form a conductive track for the shoes on a road surface. Each segment is provided with individual switching means (11) of the static type, which means are received under the segment in a trough along which a common power supply link (14) and a common return link (13) run. The switching means provide electrical continuity between the segment to which they are assigned and the power return link so long as a connection control signal for connecting a segment to the power supply link is not received from a vehicle either directly by the segment in question (5C) or by either of the immediately adjacent segments (5B, 5D). The vehicles include means for transmitting a connection control signal to a segment of track.