This paper demonstrates how to construct the boundary of the clear zone adjacent to a roadway alignment, based only on horizontal sight distance considerations, when the alignment data are piecewise-linear on a fine lattice. In this case, it is shown that the clear zone envelope is...

This paper presents improved time-dependent control strategies for small freeway networks with bottlenecks and unique origin-destination paths. It is assumed that there are no spill-overs from any of the freeway exits so that freeway queues and delays can be completely avoided by regulating...

Many transportation design problems involve the demarcation of safe zones surrounding the intended guideway, either to prevent physical collisions or to provide clearance for other requirements such as sight distance. Typically, an instantaneous solution to one of these problems can be...