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From page 37... ... Guide to Truck Activity Data for Emissions Modeling B-1 Appendix B Case Study #2: Age Distributions from Inspection Station Data B.1 Emissions Model Inputs Supported • Age distribution (primarily applicable for long-haul trucks on restricted access highways) Read the entire page →
From page 38... ... Guide to Truck Activity Data for Emissions Modeling B-2 Table B.1 MCMIS Data Fields MCMIS Fields Field Description INSPECTION_ID Unique identifying number assigned to an inspection record INSP_DATE Date the inspection was conducted. Read the entire page →
From page 39... ... Guide to Truck Activity Data for Emissions Modeling B-3 weighing process to proceed to the inspection area for a safety inspection. It is important to note that only a small number of CMVs are inspected relative to all the vehicles that pass through a weigh station facility. Read the entire page →
From page 40... ... Guide to Truck Activity Data for Emissions Modeling B-4 8. MCMIS data represents a sample of trucks operating near an inspection station instead of an entire truck population in a given county or State or even nationally. Read the entire page →
From page 41... ... Guide to Truck Activity Data for Emissions Modeling B-5 Table B.2 Sample Age Distribution Adjustment for MAR (A) Read the entire page →
From page 42... ... Guide to Truck Activity Data for Emissions Modeling B-6 In Table B.2, columns (B) Read the entire page →
From page 43... ... Guide to Truck Activity Data for Emissions Modeling B-7 FROM [MCMIS] Read the entire page →
From page 44... ... Guide to Truck Activity Data for Emissions Modeling B-8 R Script to develop age distributions by county from MCMIS data: #Load ggplot2 and RODBC libraries library(ggplot2) library(RODBC) Read the entire page →
From page 45... ... Guide to Truck Activity Data for Emissions Modeling B-9 lapply(c("COUNTY_CODE_STATE","COUNTY_NAME","INSP_UNIT_TYPE_DESC","LOCATION") , function(name) Read the entire page →
From page 46... ... Guide to Truck Activity Data for Emissions Modeling B-10 labs(x="Age (Years) ",y="Fraction of Vehicles") Read the entire page →
From page 47... ... Guide to Truck Activity Data for Emissions Modeling B-11 select states, California has the lowest proportion of out-of-State trucks being inspected (6 to 13 percent of straight trucks, about 30 percent of truck tractors) while Virginia has the largest proportion of out-of-State trucks being inspected (46 to 50 percent of straight trucks, about 70 percent of truck tractors) Read the entire page →
From page 48... ... Guide to Truck Activity Data for Emissions Modeling B-12 activity based. Spikes and troughs are apparent in these charts that correspond to changing economic conditions when more or fewer new trucks were sold. Read the entire page →
From page 49... ... Guide to Truck Activity Data for Emissions Modeling B-13 Figure B.1 VMT-Based MOVES Age Distributions Single-Unit Trucks 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age 2013 2014 2015 Read the entire page →
From page 50... ... Guide to Truck Activity Data for Emissions Modeling B-14 Figure B.2 VMT-Based MOVES Age Distributions Combination Trucks Figure B.3 VMT-Based MCMIS Age Distributions Single-Unit Trucks -- Virginia 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age 2013 2014 2015 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age 2013 2014 2015 Read the entire page →
From page 51... ... Guide to Truck Activity Data for Emissions Modeling B-15 Figure B.4 VMT-Based MCMIS Age Distributions Combination Trucks -- Virginia Figure B.5 VMT-Based MCMIS Age Distributions Single-Unit Trucks -- Texas 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age 2013 2014 2015 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age 2013 2014 2015 Read the entire page →
From page 52... ... Guide to Truck Activity Data for Emissions Modeling B-16 Figure B.6 VMT-Based MCMIS Age Distributions Combination Trucks -- Texas Figure B.7 VMT-Based MOVES versus MCMIS Single-Unit Trucks -- Virginia and Texas (2015) 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age 2013 2014 2015 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age Texas - MOVES Texas - MCMIS Virginia - MOVES Virginia - MCMIS Read the entire page →
From page 53... ... Guide to Truck Activity Data for Emissions Modeling B-17 Figure B.8 VMT-Based MOVES versus MCMIS Combination Trucks -- Virginia and Texas (2015) Three counties in Virginia and three counties in Texas with the greatest number of State-level truck inspections were selected for additional modeling. Read the entire page →
From page 54... ... Guide to Truck Activity Data for Emissions Modeling B-18 MCMIS. For testing the emission impacts, runs with the default registration-based MOVES age distributions are compared against runs with the registration-based MCMIS age distributions. Read the entire page →
From page 55... ... Guide to Truck Activity Data for Emissions Modeling B-19 Figure B.10 Selected Texas Counties Map source: Google maps. Read the entire page →
From page 56... ... Guide to Truck Activity Data for Emissions Modeling B-20 Figure B.11 VMT-Based MCMIS Age Distributions Single-Unit Trucks -- Virginia and Counties, 2015 Figure B.12 VMT-Based MCMIS Age Distributions Combination Trucks -- Virginia and Counties, 2015 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age BOTETOURT FREDERICK PRINCE WILLIAM Virginia 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age BOTETOURT FREDERICK PRINCE WILLIAM Virginia Read the entire page →
From page 57... ... Guide to Truck Activity Data for Emissions Modeling B-21 Figure B.13 VMT-Based MCMIS Age Distributions Single-Unit Trucks -- Texas and Counties, 2015 Figure B.14 VMT-Based MCMIS Age Distributions Combination Trucks -- Texas and Counties, 2015 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age EL PASO HIDALGO Texas WEBB 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Age Fraction Age EL PASO HIDALGO Texas WEBB Read the entire page →
From page 58... ... N C H R P 08-101: E nhanced Truck D ata C ollection and A nalysis for E m issions M odeling A -2-B -22 Table B.4 National, Virginia, and County Average Age Source Type Year National State County Virginia Botetourt Frederick Prince William VMTBased MOVES1 RegistrationBased MOVES1 VMTBased MCMIS1 RegistrationBased MCMIS1 VMTBased MCMIS Registration -Based MCMIS VMTBased MCMIS RegistrationBased MCMIS VMTBased MCMIS Registration -Based MCMIS Single-Unit Trucks 2013 7.54 11.68 9.19 15.04 8.52 14.75 8.70 13.40 6.75 9.77 2014 7.28 11.64 9.65 16.13 8.38 14.59 8.92 14.82 7.83 12.21 2015 7.01 11.59 9.23 15.88 8.14 13.98 9.05 17.21 7.36 11.01 Combination Trucks 2013 7.33 11.15 8.47 13.99 6.55 9.15 7.70 12.49 8.02 11.80 2014 7.49 11.43 8.54 14.83 6.54 10.13 8.15 13.00 7.99 12.14 2015 7.61 11.72 8.21 14.59 6.21 9.28 7.70 12.34 7.97 12.68 Table B.5 National, Texas, and County Average Age Source Type Year National State County Texas El Paso Hidalgo Webb VMT Based MOVES1 Registration -Based MOVES1 VMT- Based MCMIS1 Registration -Based MCMIS1s VMT- Based MCMIS RegistrationBased MCMIS VMT- Based MCMIS RegistrationBased MCMIS VMT- Based MCMIS Registration -Based MCMIS Single-Unit Trucks 2013 7.54 11.68 9.49 15.80 13.86 18.97 11.42 18.63 6.29 11.52 2014 7.28 11.64 9.70 16.13 13.60 18.79 11.70 18.73 6.52 11.67 2015 7.01 11.59 10.07 16.86 13.82 19.46 13.03 20.15 6.73 11.87 Combination Trucks 2013 7.33 11.15 9.69 15.92 12.32 17.23 10.64 19.25 8.98 13.17 2014 7.49 11.43 10.07 16.65 12.84 18.11 10.98 19.38 9.42 13.70 2015 7.61 11.72 10.29 16.87 12.44 18.28 11.52 20.06 10.31 14.49 1 The terms "VMT-based" and "registration-based" are used to minimize confusion when comparing MOVES and MCMIS data. "Registration-based MOVES" age distributions are unadjusted age distributions from MOVES inputs, while "VMT-based MOVES" distributions are adjusted by MAR. Read the entire page →
From page 59... ... Guide to Truck Activity Data for Emissions Modeling B-23 The MCMIS age distributions and the baseline MOVES national age distribution (Texas and Virginia age distributions are virtually the same as the national age distribution) were modeled with MOVES2014a to compare the emissions differences. Read the entire page →
From page 60... ... Guide to Truck Activity Data for Emissions Modeling B-24 The following observations are noted: • For single-unit trucks (source type 52/53) , the age distributions from NEI and MCMIS both track fairly closely with MOVES defaults, although their average ages are slightly older than MOVES. Read the entire page →
From page 61... ... Guide to Truck Activity Data for Emissions Modeling B-25 Figure B.15 Comparison of Age Distributions Single-Unit Trucks, Virginia 2014 Figure B.16 Comparison of Age Distributions Combination Trucks, Virginia 2014 Note: MCMIS data adjusted based on MOVES VMT per vehicle. Read the entire page →
From page 62... ... Guide to Truck Activity Data for Emissions Modeling B-26 B.6.4 Sensitivity Analysis -- Impact on Emissions Figure B.17 through Figure B.22 display the percent differences in emissions for CO, CO2, NOx, PM2.5, and volatile organic compounds (VOCs) Read the entire page →
From page 63... ... Guide to Truck Activity Data for Emissions Modeling B-27 Figure B.18 Age Distribution Emissions Differences: MCMIS from MOVES Base Case Combination Trucks Figure B.19 Age Distribution Emissions Differences: MCMIS from MOVES Base Case Virginia Single-Unit Trucks, 2015 -10% 0% 10% 20% 30% 40% 50% 60% 70% 80% 2013 2014 2015 2013 2014 2015 2013 2014 2015 2013 2014 2015 2013 2014 2015 CO CO2 NOx PM2.5 VOC MCMIS Percent Difference vs. MOVES Virginia Texas -10% 0% 10% 20% 30% 40% 50% CO CO2 NOx PM2.5 VOC MCMIS Percent Difference vs. Read the entire page →
From page 64... ... Guide to Truck Activity Data for Emissions Modeling B-28 Figure B.20 Age Distribution Emissions Differences: MCMIS from MOVES Base Case Virginia Combination Trucks, 2015 Figure B.21 Age Distribution Emissions Differences: MCMIS from MOVES Base Case Texas Single-Unit Trucks, 2015 -30% -20% -10% 0% 10% 20% 30% 40% CO CO2 NOx PM2.5 VOC MCMIS Percent Difference vs. MOVES Botetourt Frederick Prince William Virginia -20% 0% 20% 40% 60% 80% 100% 120% 140% CO CO2 NOx PM2.5 VOC MCMIS Percent Difference vs. Read the entire page →
From page 65... ... Guide to Truck Activity Data for Emissions Modeling B-29 Figure B.22 Age Distribution Emissions Differences: MCMIS from MOVES Base Case Texas Combination Trucks, 2015 Using MCMIS age distributions rather than MOVES age distributions results in an increase of CO, NOx, PM2.5, and VOC emissions for both single-unit trucks and combination trucks for the majority of counties analyzed. A few select counties, Botetourt County in Virginia for combination trucks and Webb County in Texas for single-unit trucks, show lower emissions when using MCMIS age distributions rather than MOVES age distributions across all pollutants analyzed. Read the entire page →
From page 66... ... Guide to Truck Activity Data for Emissions Modeling B-30 Figure B.23 Locations of License Plate Surveys in the Los Angeles Metropolitan Area Figure B.24 Locations of License Plate Surveys in the Las Vegas Metropolitan Area Source: Boriboonsomsin et al., 2011. Hesperia North Los Angeles Banning North Las Vegas South Las Vegas East Las Vegas Read the entire page →
From page 67... ... Guide to Truck Activity Data for Emissions Modeling B-31 Each field survey .csv file contained the following fields: • License plate number. • Licensing state code. Read the entire page →
From page 68... ... Guide to Truck Activity Data for Emissions Modeling B-32 by licensing state and one vehicle was marked as having been built in model year 2012. Evidently, it is important not to over-constrain the matching process. Read the entire page →
From page 69... ... N C H R P 08-101: E nhanced Truck D ata C ollection and A nalysis for E m issions M odeling B -33 Figure B.25 Screenshot Sample of Banning Weekday License Plate Field Survey Data Merged with the MCMIS Database Read the entire page →
From page 70... ... Guide to Truck Activity Data for Emissions Modeling B-34 B.6.6 Summary of Findings The following conclusions can be drawn from this comparison of MCMIS, MOVES, and registration-based age distributions in two states: • MCMIS is a publicly available data source for State DOTs and data inquiries can be initiated through a DART request. • Analysis of MCMIS data shows that a large portion or majority portion of heavy-duty trucks are not registered in the same State they were inspected. Read the entire page →

From page 37...

... Guide to Truck Activity Data for Emissions Modeling B-1 Appendix B Case Study #2: Age Distributions from Inspection Station Data B.1 Emissions Model Inputs Supported • Age distribution (primarily applicable for long-haul trucks on restricted access highways)