Pam, you'd have to get on Rt 280 East (10- 15 min depending on where you are in Montville), and that would then take you into Jersey City or Harrison - at least a solid 30 min ride (OR MORE) during rush hour.
Are you considering any other towns?
E. Hanover, Livingston, W. Orange, Roseland........ are just a few that are closer to the Rt 280 corridor.
Please let me know if I can be of help!
Prudential NJ Properties
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