Puerto Rico Highway 189 (PR-189) is a 15 kilometres (9 mi) long main highway which parallels very closely the first half of Puerto Rico Highway 30 from Caguas, Puerto Rico near downtown to Juncos, Puerto Rico passing through all three business centers of Caguas, Gurabo and Juncos. It ends at Puerto Rico Highway 31, and has no direct intersection with Puerto Rico Highway 198 although they are not separated by more than half a kilometer.

Puerto Rico Highway 30 (PR-30), known as Expreso Cruz Ortiz Stella, is a main freeway in eastern Puerto Rico which connects the city of Caguas to the municipality of Humacao. With a length of 30.1 km (18.7 mi), it extends from PR-1 interchange in Bairoa barrio to PR-53 junction in Buena Vista barrio.