text: As part of the Riverside South agreement, the Urban Development Corporation proceeded with planning and environmental studies for a relocated highway. But relocating and burying the elevated highway section became politically complicated when, at the same time, NYSDOT went ahead with its $70 million project to straighten, widen, and reinforce the viaduct. In 2005 Trump's majority partners sold the project to the Carlyle Group and Extell Development Company. In June 2006, the new developer began construction of a tunnel between 61st and 65th streets for the relocated highway.
  West Side Highway Replacement Project
  Following the end of the Westway project, there were debates on what to do about the rest of the highway. Vollmer Associates was contracted for the highway replacement project in September 1986. There were four alternatives: three at-grade options with a varying number of lanes and quality of roadway, and one option with grade-separated ramps over busy intersections. By November, a commission was set up to discuss the alternatives. Four days later, several sections of the highway were agreed on. It would be an elevated highway north of 49th Street; an at-grade roadway between 44th and 25th Streets, including a depressed northbound roadway from 32nd to 42nd Streets; a tunnel under a park between 20th and 25th Streets; an at-grade boulevard between 20th and Houston Streets; an at-grade road with a 3-lane elevated ramp between Houston and Harrison Streets; and a 9-lane boulevard with depressed ramps through Battery Park City. There would be 26 traffic lights. This proposal was assailed by mass-transit associations, environmental groups, and elected officials.