Many options, in no particular order of feasibility:

1. Dedicated bus lane across the highway, plus half hourly or better regular bus service.

2. A separated bicycle lane in that area to safely get you between the two.

3. A light rail line (preferably in a dedicated lane) or subway crossing highway.

4. Get a grocer opened closer to you.

5. Move north of the highway or somewhere else entirely.

6. Build a rail spur going north over the highway and add a train service.