No matter what side you're on, everyone has an opinion, and people have been sounding off about their concerns on social media.
If you've got something you want to say to BART or the unions, post your video on Instagram, Twitter, or our Facebook page and use the hashtag #DearBART.
Also, tell us who you are and where you're from. You might see your video on TV!
See what some of our viewers wanted to tell BART:
- haliaroth's message to BART
- chunkz_babyy's message to BART
- mraechan's message to BART
- angelakarena's message to BART
- johnsteen67's message to BART
- djaledreyes's message to BART
Stay with ABC7NEWS.COM for updates on the looming BART strike and information on how to get around if the trains stop running. Follow us on Twitter, Facebook, and Google+ and download our news app for the latest news whenever and wherever you want.