My extra tips:

1. Figure out where there are bike shops en route. Just in case!

2. Research the bus routes and other transit en route. We can bring bikes on the train and buses have bike racks. I know most of the bus lines and train locations so my backup plan is hop on the train/bus. Walking 4 miles is fine but I may not always be wearing the right shoes or have too much stuff.

One more thought:

I did the urban cycling class given by my local bike coalition. It helped me feel,more confident in traffic. It was great! And free.