"INVESTIGATION LANE"

Investigation on entry capacities of single-lane roundabouts

Bothheavy goods vehicles (HGV) and exiting vehicles can significantly affect the entry capacity of a roundabout. However, their effects have not been taken into account in HCM 2000 model.Recently two studies have been carried out to address this issue: 1) Dahl and Lee (2012) proposed an expectation theory based approachto incorporate the effect of HGVs [1]; and2)Qu et al. (2013) deriveda new ro...

Mac Lane Method in the Investigation of Magnetic Translation Groups

Central extensions of the three-dimensional translation group T ≃ Z3 by the unitary group U(1) (a group of factors) are considered within the frame of the Mac Lane method. All nonzero vectors t ∈ T are considered to be generators of T . This choice leads to very illustrative relations between the Mac Lane method and Zak’s approach to magnetic translation groups. It is shown that factor systems ...

Passing Lane Effectiveness on Two-Lane Roads

IN T R O D U C T IO N A passing lane is an added lane provided in one or both directions of travel on a conventional tw o-lane highw ay to im prove passing oppo r­ tunities. T his definition includes passing lanes in level or rolling terra in , clim bing lanes on grades, and short four-lane sections. T he length of the added lane can vary from 1,000 feet as m uch as 3 miles. Figure 1 illustrate...

Homer Lane

Joan Lane

The death of Dr Joan Lane after a short illness in May of this year is a great and sad loss to her colleagues and friends and to the history of medicine community. Joan was about to take retirement from the University of Warwick, where she had taught for the past twenty-two years. Although she had no intention of ceasing with her research activities, she was planning to spend more time with her...