treasure valley road dust study: final report - ResearchGate

Table 5-13. Year 2000 Paved Road Dust Emissions by Road Class
Road Class
Average
Winter Day
Paved Road
Dust
Emissions
(metric
tons/day)
Road Class
percent of Winter
Emissions
Annual
Average Daily
Paved Road
Dust
Emissions
(Metric
tons/day)
Road Class
percent of Annual
Emissions
Arterial 48.0 59.1 35.9 57.9
Collector 9.2 11.3 7.3 11.8
Interstate 16.5 20.4 11.8 19.0
Local/Residential 7.5 9.2 7.0 11.3
Figure 5-4. Map of distributions of road dust emissions. Emissions per link have been normalized with the
length of the link. The units of the numbers in the legend are grams per day per km of link. Darker lines
correspond to links with higher emissions on a per kilometer basis.
5.3.2 Unpaved Roads
Unpaved Road Emissions For the Treasure Valley are summarized in Table 5-14. Note
that actual emissions were assumed to be constant between the years 2000 and 2020. However,
in distributing the emissions to the Traffic Demand Model links (see section 5.2.4 for
clarification), the respective TDM network associated with each year was used. Effectively, this
moves emissions from the links that exist in the TDM for the year 2000 to the new links in the
network for the years 2010, 2015, and 2020. An example of the unpaved road dust emissions
distribution is shown in Figure 5-5.
5-14