Safety Implications of the Use of the Flashing Yellow Arrow for Permissive Left Turns

State-of-the-art Literature Review on Permissive/ Protected Left-turn Control

In spring 2010, the Illinois Department of Transportation initiated an areawide implementation to integrate the flashing yellow arrow as the display for the left-turn permissive interval at more than 100 intersections operating with protected/permissive left-turn (PPLT) control. Bradley University was retained to perform an effectiveness evaluation of the FYA at these locations. The purpose of ...

Safety Implications of Conversions to Flashing Yellow Arrow Indications

Guidelines for the Use of Protected/ Permissive Lefi-Turn Phasing

T urning left across opposing traffic at a signalized intersection could result in a traffic accident, as well as create motorist delay. A solution to the left-turn problem may be the addition of a left-turn phase when certain guidelines are met.’ After a decision has been made to add a left-turn phase, one of two basic alternative phasing methods is commonly used. In Kentucky, the predominant ...

"But let me talk": An Investigation into Teachers' Interaction Patterns in EFL Classrooms

Drawing on Walsh's (2012) idea that boosting learners' contribution and interaction can play a key role in their foreign language learning, this mixed-methods study tried to cast some light on the ways by which teachers, via their choice and use of language, create or block learners' contribution in direct interactions in the classroom. A total of 800-minute recordings of 10 teachers' talks and...

Developing an Analytical Model and Simulation of The Contraflow Left-Turn Lane at Signalized Intersections

At some intersections, excessive queue lengths may spill out of the left-turn bay and block the through lanes, jeopardizing level of service for the entire intersection. One of the most effective plans recently presented by the researchers is the "Contraflow left-turn lane" (CLL) In this method, left-turn vehicles will use the nearest lane in the opposite direction in addition to the usual left...