There have been calls for a walkway or bike lane on the Verrazzano-Narrows Bridge since its opening, when several people protested over the lack of bike lanes at the bridge's opening ceremony. In 1977, as a temporary solution, the city modified three buses to fit 12 bikes and 20 passengers each, then operated these buses on a new "S7 Bridge" route. In 1993, the New York City Department of City Planning called for a footpath across the bridge as part of their Greenway Plan for New York City. The next year, the city sought a $100,000 federal grant to fund a feasibility study into a Verrazzano Bridge pedestrian and bike path. In 1997, the DCP released its study, which found that two footpaths running between the suspender ropes along the upper level, separated for pedestrian and cyclist use, would cost a minimum of $26.5million. The MTA at the time expressed concern about the "safety and liability inherent in any strategy that introduces pedestrian and bicycle access" to the bridge.