I tried it today away from SBR wifi....in Phillipsburg and Grand Case. It does not work with out a data (internet/cell) connection ....so if you have a phone that can be used all over Island without wifi then IN THEORY it would work...but....it would need data from MANY other connected Waze users to produce a traffic report ..one or two moving users won't tell you anything...Otherwise just use downloaded Google maps for maps not traffic