How about a tunnel that bypasses Providence Station entirely? have it between the tangent track in East Providence to the tangent track in Cranston and make the Airport Station the major stop for HSR? HSR trains between Boston and PVD would use the current route. If the commuter system goes electric. it would capture virtually all of the traffic between Bos and PVD anyway. The HSR trains that travel between Boston and PVD would actually be scheduled for the Providence/ n. Metro area- NYP WAS market and the trains that stop at the airport station would service the south county market.