TRAVELLING ON FRIDAYS
Thursday, 22nd July 2010
If possible, one should not travel more than 3 Parsa on Fridays, unless one is sure that Shabbos (Sabbath) preparations are ready at ones destination.
(A Parsa is either 4 KM, or the equivalent time to travel 4 KM by foot, which is assumed to be 72 minutes. Thus on Fridays one should not undertake trips longer than 3.5 hours unless one is sure that Shabbat preparations are ready at one's destination.)
It's important to plan one's trip such that even with unexpected heavy traffic one arrives at one's destination long before candle-lighting, so that one has time to wash before lighting.
Source: Kitzur Shulchan Aruch 68:11
