  We construct an inflation model on the Randall-Sundrum I (RSI) brane where a
bulk scalar field stabilizes the inter-brane separation. We study impact of the
bulk scalar field on the inflationary dynamics on the brane. We proceed in two
different approaches: in the first approach, the stabilizing field potential is
directly appeared in the Friedmann equation and the resulting scenario is
effectively a two-field inflation. In the second approach the stabilization
mechanism is considered in the context of a warp factor so that there is just
one field present that plays the roles of both inflaton and stabilizer. We
study constraints imposed on the model parameters from recent observations.
