via Expreso Rafael Martínez Nadal/PR-20 Fastest route now due to traffic conditions San Juan Get on Hwy 1 S/PR-1 S in Santurce from C. de la Luna, PR-25 and PR-26 Take Carr Puerto Rico 2 O/PR-2 W and Expreso Rafael Martínez Nadal/PR-20 to Av. David Urbina in Guaynabo. Exit from Expreso Rafael Martínez Nadal/PR-20 Take PR-837, PR-833 and Carr. 174/PR-174 to Cll 5 in Bayamón