Instead of a bridge over I-5 at Balboa for bikes and peds, widen the existing bridge at Clairemont Drive to accommodate bikes and peds from that Trolley Station. This would make it much safer, less congested to cross there. It has lower elevation, too, so no need for a tall, obstructive,spiraling ramp as suggested for the Balboa Station. Bikes can then go north to Grand for Pacific Beach or south to Sea World Drive for Mission/Ocean Beach.
Build a bicycle/pedestrian bridge from No. Morena to Santa fe St to connect with the Rose Canyon bike path.