It continues in parallel with Interstate 295 as it crosses Tukey's Bridge between exits 8 and 9.

It picks up the designation from Auburn Street, which continues as State Route 100 south of its intersection with Washington Avenue.

It continues solely as Washington Avenue past Riverside Street, close to I-95, before turning southeasterly.

Allen Avenue picks up the SR 100 designation at the next intersection as it continues southwesterly.

[4] Part of its final section, up to its intersection with Cumberland Avenue (SR 100), has become notable for its restaurants.