Writing is key to educational and workplace success. The majority of computer-based writing support applications target K-12 students and offer standard feedback concerning the U.S.centric, 5-paragraph, expository essay genre, which is typically taught to developing writers and used on standardized tests. This writing demo takes a “left turn”. By “left turn”, we mean that this demo is illustrat...

T Texas Transportation Institute (lTI) conducted a study to investigate the feasibility of applying artificial intelligence (AI) technology and expert systems (ES) design concepts to a traffic engineering problem. Prototype systems were developed to analyze user input, evaluate various reasoning, and suggest suitable left turn phase treatment. These systems were developed using AI programming t...

Separate turn phases are often used on the approach legs to intersections with heavy left turns. This wastes capacity on the approach because some of its lanes cannot discharge during its green phases. The paper shows that the problem can be eliminated by reorganizing traffic on all the lanes upstream of an intersection using a mid-block pre-signal. If drivers behave deterministically, the capa...

Most of the collision warning systems currently available in the automotive market are mainly designed to warn against imminent rear-end and lane-changing collisions. No collision warning system is commercially available to warn against imminent turning collisions at intersections, especially for left-turn collisions when a driver attempts to make a left-turn at either a signalized or non-signa...

An extended car-following model is proposed in this paper to analyze the impacts of V2V (vehicle to vehicle) communication on the micro driving behavior at the un-signalized intersection. A four-leg un-signalized intersection with twelve streams (left-turn, through movement, and right turn from each leg) is used. The effect of the guidance strategy on the reduction of the rate of stops and tota...

A high-resolution (HR) data system for an intersection collects the location (lane), speed, and turn movement of every vehicle as it enters an intersection, together with the signal phase. The system operates 24× 7. The data are available in real time and archived. The archived data are used in a three-step automated procedure to optimize timing plans. In the first step, the data are clustered ...

A traditional road diet design converts a four-lane two-way to three-lane consisting of two through lanes and center left turn lane. This paper introduces new application the in an urban corridor. Specifically, into two-lane with full-time parking both directions. The analyzed traffic impacts on corridor New Jersey Avenue, northwest, city Washington, District Columbia. included five signalized ...