Mountainside New Jersey Traffic 2024-12-24 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Mountainside New Jersey Westfield, NJ 3.57 mi Springfield, NJ 3.73 mi Summit, NJ 3.86 miInterstate highway exits close to Mountainside New Jersey Exit 45, i78 2.16 mi Exit 44, i78 3.29 mi Exit 41, i78 4.34 miInterstate highways close to Mountainside New Jersey i78 map 2.16 mi i95 map 13.36 mi i287nj map 14.89 miState roads close to Mountainside New Jersey US 22 NJ map 0.79 mi NJ UNION 635 map 1.81 mi NJ CR 577 map 2.07 mi