State Highways of New Jersey

In the 1970s, a new freeway was built to bypass the existing NJ 24 between Millburn and Springfield. For a time, until I-78 was completed through the Watchung Reservation, the section of I-78 east of the merge also bore the NJ 24 designation. The concurrency was dropped after NJ 24 was extended westward in the early 1990s.

The current NJ 24 starts at I-287 in Hanover Township, a few miles north of Morristown, and runs down to I-78 in Springfield. While an extension beyond Hanover has been discussed, there are currently no plans in the works to build it. The bypassed old highway is now NJ 124, which straddles the NJ 24 freeway in the 1970s section where it runs along the county line between Summit and Millburn. West of I-287, traffic still uses either “old Route 24” or NJ 10, which sits a few miles to the north.

Mile	Street Name	Feature
	Road continues eastward as
10.42	Eastern terminus of , Springfield Twp, Union Co
10.42			merge
10.18			underpass
10.00		Baltusrol Ave	underpass	Baltusrol Ave
9.86		Bryant Brook	culvert	Bryant Brook
9.60		Morris Ave	underpass	EXIT 9B Morris Ave
9.45		Springfield Twp, Union Co Summit City, Union Co
9.45		Broad St EXIT 9B	underpass	Broad St
9.07		Lackawanna Railroad	underpass	Lackawanna Railroad
8.90		Summit City, Union Co Millburn Twp, Essex Co
8.83		east	underpass	east
8.60		Hobart Gap Rd EXIT 9A	underpass	Hobart Ave
8.50				Millburn Twp, Essex Co Summit City, Union Co
8.45		Brantwood Dr	overpass
8.30				Summit City, Union Co Millburn Twp, Essex Co
7.99		EXIT 8	underpass	EXIT 8 Summit Ave
7.44		Millburn Twp, Essex Co Summit City, Union Co
7.20		Summit City, Union Co Millburn Twp, Essex Co
7.07		John F. Kennedy Dr EXIT 7B-C	overpass	EXIT 7 John F. Kennedy Dr
6.99		west EXIT 7A	overpass	west
6.82		Passaic River	bridge	Passaic River
6.58		Millburn Twp, Essex Co Chatham Boro, Morris Co
6.29		Passaic Ave	underpass	Passaic Ave
5.98		Branch Passaic River	bridge	Branch Passaic River
5.75		Chatham Boro, Morris Co Florham Park Boro, Morris Co
5.75		Triborough Rd (unbuilt)	underpass	Triborough Rd (unbuilt)
5.43		Brooklake Rd	underpass	Brooklake Rd
5.02		Spring Garden Brook	bridge	Spring Garden Brook
4.57		Florham Park Boro, Morris Co Madison Boro, Morris Co
4.45		Greenwood Ave	underpass	Greenwood Ave
4.15		Lorraine Rd	underpass	Lorraine Rd
4.10		Madison Boro, Morris Co Florham Park Boro, Morris Co
3.99		Ridgedale Ave	underpass	Ridgedale Ave
3.09		East Branch Black Brook	bridge	East Branch Black Brook
2.91		West Branch Black Brook	bridge	West Branch Black Brook
2.46		Branch Black Brook	bridge	Branch Black Brook
2.12		Florham Park Boro, Morris Co Hanover Twp, Morris Co
2.09		Columbia Tpk EXIT 2	overpass	EXIT 2 Columbia Tpk
1.65		Hanover Twp, Morris Co Morris Twp, Morris Co
1.65		Park Ave	underpass	Park Ave
0.70		Morris Twp, Morris Co Hanover Twp, Morris Co
0.70		Whippany Rd EXIT 1	overpass	EXIT 1 Whippany Rd
0.39			overpass
0.00			merge
0.00	Western terminus of , Hanover Twp, Morris Co