If 'All is Well' you have Gods grace on your side.
But Mumbai is where God hardly descends.
Let me give you a lowdown. Whether taxi, or a Ferrai it is not going to help. Between Thane and Borivali there is a small ghat/pass section where frequently trucks get struck/fail. The traffic stops with 1 or 3 km long line. Once you are able to clear this, which is occassional you will further get stuck at Kashi Mira junction on the western express highway where there is a 2 km long...
more... fly over coming up. Every day there is 2 km long traffic line due to bottleneck created.
This is not usual but a daily occurence.
But still you want a chance to be taken, try your luck!