Yes, the Exit 29 ramp EB on I-78 was done to avoid building a long flyover across both I-78 and I-287 and the WB I78 to I-287 ramp. Remember other states would gladly consider a three level stack, although NJ does have some in Elizabeth at US 1 & 9 and NJ 81 and in Woodbridge at the Tangle, they generally don’t consider that option here.
Other states would have the much needed widenings such as US 9 in Ocean County between Forked River and Lakewood (( FDOT would have US 9 as a six lane arterial from NJ 166 to NJ 88), NJ 31 from Flemington to Washington, and US 206 from Bedminster to Netcong done already. Not in New Jersey.