You can take the bus (Lakeland) from Sparta directly to Port Authority. During rush hour it takes about 1 hour and 20 minutes to 1 hour and 40 minutes, depending on how heavy traffic is. Another alternative is to drive to the park and ride in Parsippany at the intersection of Beveryck and Route 46. From Parsippany, it will take about 50 minutes to get into Port Authority. Go to Lakeland Bus Lines on the web and check out the schedule.

Many people drive down route 15 to Route 80 to Denville or Dover then take the train the rest of the way. If you prefer to drive. It would be route 15 to 80 then depending if you want Holland, Linclon or GWB you stay on 80 or take 280. There are also comuter buses that leave from Sparta that you can take to Dover(to train) or to Manhattan. You can check out http://www.njtransit.com for more train info.