A) Draw the curve and clearly describe the relationship between pedestrian flow and provided area per pedestrian in walkways and sidewalks. B) How have the different Levels Of Service (LOSs) been defined on the curve? Solution the level of service criteria were the same for both basic freeway and multilane highway segments. the boundary condition were selected by the HCQSC to produce reasonable ranges in maximum service flow rates THEN the revision to LOS boundries were introduced that reflected changes in the basic speed flow curves for multilane highwaysand the basic freeway segments Te change in these curves were discusswe in detail, because of the changesLOS boundries were tweaked in1994 and again in 1997 to produce more consistent defination..