HW3 - The University of Texas at Austin Chandra Bhat Dept...

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Unformatted text preview: The University of Texas at Austin Chandra Bhat Dept of Civil, Architectural & Environmental Engineering Fall 2016 CE 321 Transportation Systems Homework Assignment No. 3 Modal Split and Traffic Assignment Date distributed: September 29, 2016 Due date: October 6, 2016 I. INTRODUCTION In your previous assignment, you determined the total AM peak vehicle trips on each freeway and arterial link of the Atlantis transportation system in 2020 (intra—zonal trips do not use the freeway or the arterial). On reviewing those numbers, an air-quality modeling team assembled by \ the Atlantis city council has found that the mobile source emissions caused by the traffic flow on segments BC and CD (see attached figure) will exceed the National Ambient. Air Quality Standards (NAAQS) for carbon monoxide and ozone set by the U.S. Environment Protection Agency (EPA). In particular, the air quality team has determined that the number of AM peak vehicle trips on segments BC and CD should. not exceed 2200 vehicles if the NAAQS are to be met. Failure to meet the NAAQS is likely to result in substantial federal funding cutbacks in maintaining, operating, and upgrading the current transportation infrastructure. In addition, recent federal legislations mandate the submission of a metropolitan transportation plan with a planning horizon of 20 years, so the Atlantis city council should explore various alternatives for the year 2020 and present a comprehensive transportation plan to the Federal Highway Administratiou (F HWA) and the Federal Transit Administration (FTA). 2. AN ALTERNATIVE PLAN FOR 2020 As an alternative to the "do nothing" option for the year 2020, the Atlantis City Council is considering the provision of the rail rapid transit and bus service depicted in the enclosed figure, with no change in the road system. However, a toll. of $2.00 will be imposed on all auto vehicles entering the CBD zone (zone 4) during the AM peak under this alternative plan. You are the head of the local transportation planning agency and have been assigned the task of analyzing this alternative option to a) Determine if the alternative plan will result in the attainment of the NAAQS, and b) Estimate the total potential ridership on the transit system (rail rapid transit/bus service combination) and the total potential fare revenues from the transit system. ...
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