A new mass-transit line has been planned several times to cross España, the first one being called as MRT-4, also called by some as the Red Line. The said MRT line will traverse the Boulevard until it reaches San Jose del Monte City, Bulacan which has been shelved in favor of MRT-7 line that diverted and cut short the terminus at North Avenue. After the MRT-7 proposal was awarded, the plans were revived to create a separate line for the remainder of the alignment from the original MRT-4 proposal that the MRT-7 left out which was named MRT-9 that was envisioned to traverse from Lerma to North Avenue. Subsequently, this was again shelved in favor of a BRT line that traverses from Lerma to UP Diliman but was again shelved now in favor of an unsolicited proposal put up by PNR and Alloy MTD using the same remaining MRT-4 and BRT alignment with the working project name "PNR East-West Rail" and is believed to be officially numbered Line 8, should the proposal push through.