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Title: Urban design and public exposure to carbon monoxide

Abstract

The air pollutant carbon monoxide (CO) is produced by incomplete combustion in motor vehicles, space heating, industrial processes, and incineration. Current research indicates that higher density residential developments, because they lead to reduced demand for fuels for home heating and transportation, tend to lower total carbon monoxide emissions. However, it is in these same areas that concentrations of CO are the highest because of the density of emitters. Since carbon monoxide standards specify maximum allowable concentrations rather than emissions, they tend to deter further development in locations where concentrations are already high - i.e., high density downtown areas. This deterrent effect contributes to greater total emissions of carbon monoxide; hence, it may be desirable to devise a means of controlling the public's risk of exposure to high CO levels in downtown areas without deterring new center city residential development. In protecting the public from the risk of exposure to damaging levels of carbon monoxide, two approaches are possible; the pollutant's concentration may be lowered by traffic management measures or the public's rate of exposure may be reduced through urban design features. The present emphasis on traffic management stresses improving the flow and reducing the level of traffic, goals that aremore » extremely costly to achieve in downtown areas. This paper examines ways to reduce risk of exposure by the physical design of new downtown residential developments. The concept is not a novel one, having been successfully implemented in industry to provide occupational health and safety.« less

Authors:
Publication Date:
Research Org.:
Argonne National Lab., IL (USA)
Sponsoring Org.:
US Energy Research and Development Administration (ERDA)
OSTI Identifier:
7319278
Report Number(s):
ANL-76-XX-22
DOE Contract Number:
W-31-109-ENG-38; NSF-AG-352; GI-32989A2
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 29 ENERGY PLANNING, POLICY AND ECONOMY; CARBON MONOXIDE; ENVIRONMENTAL TRANSPORT; HEALTH HAZARDS; HUMAN POPULATIONS; LAND USE; PLANNING; URBAN AREAS; AIR POLLUTION; AIR POLLUTION CONTROL; AUTOMOBILES; BUILDINGS; DESIGN; EXHAUST GASES; RESIDENTIAL SECTOR; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; GASEOUS WASTES; HAZARDS; MASS TRANSFER; OXIDES; OXYGEN COMPOUNDS; POLLUTION; POLLUTION CONTROL; POPULATIONS; VEHICLES; WASTES; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989); 530100 - Environmental-Social Aspects of Energy Technologies- Social & Economic Studies- (-1989)

Citation Formats

Santini, D. J. Urban design and public exposure to carbon monoxide. United States: N. p., 1976. Web. doi:10.2172/7319278.
Santini, D. J. Urban design and public exposure to carbon monoxide. United States. doi:10.2172/7319278.
Santini, D. J. Fri . "Urban design and public exposure to carbon monoxide". United States. doi:10.2172/7319278. https://www.osti.gov/servlets/purl/7319278.
@article{osti_7319278,
title = {Urban design and public exposure to carbon monoxide},
author = {Santini, D. J.},
abstractNote = {The air pollutant carbon monoxide (CO) is produced by incomplete combustion in motor vehicles, space heating, industrial processes, and incineration. Current research indicates that higher density residential developments, because they lead to reduced demand for fuels for home heating and transportation, tend to lower total carbon monoxide emissions. However, it is in these same areas that concentrations of CO are the highest because of the density of emitters. Since carbon monoxide standards specify maximum allowable concentrations rather than emissions, they tend to deter further development in locations where concentrations are already high - i.e., high density downtown areas. This deterrent effect contributes to greater total emissions of carbon monoxide; hence, it may be desirable to devise a means of controlling the public's risk of exposure to high CO levels in downtown areas without deterring new center city residential development. In protecting the public from the risk of exposure to damaging levels of carbon monoxide, two approaches are possible; the pollutant's concentration may be lowered by traffic management measures or the public's rate of exposure may be reduced through urban design features. The present emphasis on traffic management stresses improving the flow and reducing the level of traffic, goals that are extremely costly to achieve in downtown areas. This paper examines ways to reduce risk of exposure by the physical design of new downtown residential developments. The concept is not a novel one, having been successfully implemented in industry to provide occupational health and safety.},
doi = {10.2172/7319278},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1976},
month = {Fri Oct 01 00:00:00 EDT 1976}
}

Technical Report:

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  • The major objective of this study was to determine a method of estimating the two critical annual statistics of the carbon monoxide levels at a proposed highway site, the annual second maximum 8-hr average and the annual second maximum 1-hr average, using considerably less than one full year of data. Specifically, the possibility of sampling for one month was to be investigated along with other sampling plans. In the extrapolation from this small data set, three separate possibilities were to be considered: having auxiliary CO data available having auxiliary meteorological data available, and having no auxiliary data available. The mainmore » result of this study was the following. As long as it is possible to monitor during a part of the CO season (October to January, possibly February), the two statistics mentioned can be accurately estimated from one month of sampling. The restriction of monitoring to the CO season represents a change from some current practices. The most accurate of the methods tested was the simplest - use the highest 8-hr average observed during the period of monitoring at the highway site as the estimate of the annual second maximum. It must be verified that the monitoring period contained enough meteorologically adverse days to make the estimate valid. Such adverse days must be determined using an existing monitoring station nearby which has been operating for at least a year, by a meteorological index, or, less persuasively, by typical rates of occurrence of adverse days for the months encompassed by the monitoring period.« less
  • This report describes an urban area approach by which traffic data provided by traffic planning agencies can be used to derive estimates of carbon monoxide emissions and their geographical distribution throughout the city; the estimates of emissions then can be used in a meteorological diffusion model to calculate carbon monoxide concentrations at several selected points. This approach has been applied to Washington, D.C., where projected traffic data for 1985 were available. Comparing the 1985 and 1964 results provides the pattern of expected growth in emissions for different geographical regions and indicates the resulting increase in concentrations at selected points withinmore » the city. The pattern of emissions growth also has been briefly compared with that for Chicago.« less
  • The objective of this study was to obtain a better understanding of CO concentrations immediately upwind of urban roadways, the 'local background' values, and how these concentrations depend upon the surrounding traffic and the general meteorology. Measurements were made at seven sites during the winter of 1993. Local background CO concentrations were characterized by an absence of short term fluctuations, a steady buildup during the period between 3:00 PM and 11:00 PM, and a lack of spatial gradients in the eight-hour average values. Distinctly different log-normal distributions of the eight-hour averages were observed for 'trafficked' sites versus 'urban park' sites,more » with mean values of 1.6 and 1.0 ppm respectively. A simple regression model was developed to predict the local background CO. This regression model included distance from the roadway, average daily traffic on nearby roadways, and the frequency of low wind speeds.« less
  • Carbon monoxide (CO) exposures were measured inside a motor vehicle during 88 standardized drives on a major urban arterial highway, El Camino Real (traffic volume of 30,500-45,000 vehicles per day), over a 13-1/2 month period. For the 88 trips, the mean CO concentration was 9.8 ppm, with a standard deviation of 5.8 ppm. Of 9 covariates that were examined to explain the variability in the mean CO exposures observed on the 88 trips (ambient CO at 2 fixed stations, atmospheric stability, seasonal trend function, time of day, average surrounding vehicle count, trip duration, proportion of time stopped at lights, andmore » instrument type), a fairly strong seasonal trend was found. A model consisting of only a single measure of traffic volume and a seasonal trend component had substantial predictive power; by contrast, the ambient CO levels, although partially correlated with average exposures, contributed comparatively little predictive power to the model. This study shows: (1) the mass balance equation can relate exterior CO concentrations as a function of time to interior CO concentrations, (2) CO exposures on urban arterial highways vary with season, (3) momentary CO experienced behind red lights vary with the intersection, and (4) an averaging time model can simulate exposures during short trips (20 minutes or less) on urban arterial highways.« less
  • The contents include the following: appendix a: recommended modeling protocol contents; appendix b: performance measure formulations; and appendix c: technical discussion of uam model inputs with example application.