Temps finally up to 32F in Metuchen and most of the surrounding area. About 0.10-0.15" of glaze on top of all untreated surfaces as far as I can tell. Lots of spinouts and accidents reported. Fortunately, well-traveled roads with dark surfaces are above freezing now and unlikely to be an issue from here on out, but be especially careful on side streets, driveways and sidewalks.
North of 78, most locations are still a bit below 32F, although fortunately, the precip is over for most of Central/North Jersey, so they're unlikely to get any more freezing rain, but the freezing rain that they got is resulting in treacherous conditions. Will take a few more hours to get above 32F north of 78 and then 80.
Edit: note that the winter weather advisories were dropped for Mercer/Middlesex and all NJ counties S/E of there, as well as for the SE PA counties near Philly, as temps are 32F or above. Advisories are still up for the Lehigh Valley, Hunterdon, Somerset, Morris, Warren until 2 pm for some lingering freezing drizzle and for the Poconos/Sussex until 6 pm for the same reason, as temps there will be the last to go above 32F.