raffic flow on a three$-$lane $($ane direction freeway can be described by the Greenshields model. One lane of the three lanes on a section of this freenay will have to be closed to andertake an emergency bridge repair that is expected to take $2$ hours. It is estimated that the capacity at mean free flow speed of the highway le $55$ mich and the jam density is svo percent of the capacity, waing the deterministic approach, determine the following.