As a member of the WSP Team, Castillo Engineering provided Construction Management for the widening of Florida’s Turnpike Extension/SR 821 to 10 lanes, from Dolphin Expressway/SR 836 to NW 106 Street/Flagler Station Boulevard. The project entails converting NW 117 Avenue, between NW 34 Street and NW 41 Street, into a northbound Turnpike entrance ramp and a slip ramp for local traffic continuing on NW 117 Avenue, north of NW 41 Street. Work consists of interchange improvements at SR 836 and NW 12 Street including the construction of three new ramps, and intersection improvements at NW 12 Street, NW 41 Street and NW 74 Street. The Turnpike bridges over SR 836/NW 12 Street, NW 25 Street, NW 41 Street, NW 58 Street and the NW 74 Street Canal will be widened. Work also includes constructing sound walls along qualifying residential areas adjacent to the Turnpike, asphalt milling and resurfacing, guardrail and fencing, lane striping, drainage, signage and lighting improvements.