This paper addresses the boundary control problem of the transport
equation. Namely, we propose a control method, which is merely a delayed
output feedback relying on a partial pole placement idea, that consists
in assigning an appropriate exponential decay rate to the closed-loop
system's solution. The proposed control structure appearing in the
transport boundary, which has proven its effectiveness in controlling
finite dimensional systems, consists of an autoregressive relation
linking the transport equation's input and output. The obtained result
provides an analytical lower bound for the solution's exponential decay.