01590716

Component

Work zone has tremendous impacts on existing roadway layouts such as shoulders, lane markers and lanes width. The roadway roughness and surface structure in work zones would be different with regular ones, which could possibly result in different vehicular emissions. The main objective of this study is to investigate the effects of work zone on vehicular emissions in consideration of roadway roughness profiles. Project US 290 in Houston, Texas that created a number of work zones was selected as the case study. Second by second emission data were collected by a Portable Emission Measurement System (PEMS). Two carry-on smartphone applications iOnRoad and Roadroid were used to record the real-time videos and roughness profile, respectively. The selected roadway section of the freeway US 290 was visually identified into two categories: with work zone and without work zone. The Operating Mode Binning Identification (OMID) numbers were used to statistically analyze vehicle emissions based on the classifications of vehicle speed and vehicle specific power (VSP). An emission factor model was proposed and applied to each OMID with the parameters calibrated. The calibration and validation results suggested that increased roughness contributed to more fuel consumption, CO₂ and NOx emissions and less HC and CO emissions.

This paper was sponsored by TRB committee ADC20 Standing Committee on Transportation and Air Quality.

01584066

16-4740

English

18p

2016

Transportation Research Board 95th Annual Meeting

Digital/other

Figures; Maps; Photos; References; Tables

Case studies; Evaluation; Fuel consumption; Pollutants; Roughness; Work zones

Houston (Texas)

Construction; Environment; Highways; I15: Environment; I23: Properties of Road Surfaces; I50: Construction and Supervision of Construction

Transportation Research Board Annual Meeting 2016 Paper #16-4740

TRIS, TRB, ATRI

Jan 12 2016 6:05PM