101 THIS TWO-PART FEATURE BEGAN with a discussion of why unconventional left-turn alternatives hold promise for the relief of congested urban and suburban arterials. Part One, which was printed in the September 1998 issue of ITE Journal on pages 26–29, also described three unconventional alternatives—the median U-turn, the bowtie and the superstreet. This part discusses four more alternatives.

In this paper, the concept of using bus probes for urban street travel time estimation in the advanced traveler information system (ATIS) application is investigated through both a thorough literature review and a case study in downtown Chicago using the Chicago Transit Authority (CTA)'s buses. First, existing bus probes studies are reviewed and compared with respect to the research objectives,...

Platoon based traffic flow models form the underlying theoretical framework in traffic simulation tools. They are essentially important in facilitating efficient performance calculation and evaluation in urban traffic networks. For this purpose, a new platoon-based macroscopic model called the LWR-IM has been developed in [1]. Preliminary analytical validation conducted previously has proven th...

The characteristics of traffic flows on signalized arterials are examined within a cellular automata micro-simulation model. The model is used to analyze arterial throughput and travel times for given densities, coordination schemes and signal spacings. A fundamental 3-D relationship between flow, density and offsets for signalized arterials is established. It is shown, in particular, that arte...

Travel time estimation in urban arterials is challenging compared to freeways and multilane highways. This becomes more complex under Indian conditions due to the additional issues related to heterogeneity, lack of lane discipline, and difficulties in data availability. The fact that most of the urban arterials in India do not employ automatic detectors demands the need for an effective, yet le...

:Traffic congestion is a major problemof fastgrowing metropolises due to the constantmobility of people and goods.The main objective this study was identify existing potentialfuture traffic operations at Pindi Bypass Chan Da Qillaintersections Gujranwala along GrandTrunk (G.T) road evaluate potential future intersection improvements. Each wasanalysed using software SIDRA (Signalised&unsigna...