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APPENDIX B

UPDATED RESEARCH TABLES FROM THE TRANSPORTATION AND PM LITERATURE ASSESSMENT

Tables provided at the beginning of each chapter in the Transportation and PM Literature Assessment (Tamura et al., 2005) listed research issues by broad research category. These research issues were used to create the list of 20 research recommendations in Table 1 of this report. The tables from the literature assessment contained a column called "FHWA priority" that remained blank. The intended use of this column was to allow the workshop participants to prioritize these research issues. These tables have now been updated with the research priorities as identified in Table 4 of this report.

Table B‑1. List of monitoring research issues from the literature assessment (Table 2-1 of the literature assessment). Priorities are listed as high, medium, or low (H, M, or L); their number (e.g., M1, M2, or M3) corresponds to the priority research topics identified in Table 4 of this Strategic Plan. NS means the research issue was not selected as one of the low-, medium-, or high-priority research needs in this Strategic Plan.

2. Monitoring issues	Strategic Research Documents^a	Recently Completed Work	Ongoing or Planned Work	FHWA Priority (as numbered in Table 4)
2.1 Measurement methods
2.1.1 Improving measurements and characterization of carbonaceous aerosols	NARSTO, CENR	X	X	M7
2.1.2 Improving measurements and characterization of semi-volatile aerosols	FHWA P3, NARSTO	X	X
2.1.3 Evaluating method accuracy, precision, and comparability for PM measurements	NARSTO, CENR	X	X
2.2 Monitoring networks and uses
2.2.1 Identification of PM_2.5 nonattainment areas	FHWA P1	X		NS
2.2.2 Improving the spatial extent and temporal resolution of PM and precursor monitors and instruments	NARSTO, CENR, NRC	X	X	M8
2.2.3 Integrating transportation concerns into existing monitoring networks	FHWA P2	X		NS
2.3 Monitoring and characterizing PM near roadways		X	X	H1

^a Project numbers (P#) are identified for areas identified in the 2000-2004 FHWA strategic work plan for PM research; see Appendix C for a summary listing of the 2000-2004 projects.

Table B‑2. List of characterization research issues from the literature assessment (Table 3-1 of the literature assessment). Priorities are listed as high, medium, or low (H, M, or L); their number (e.g., M1, M2, or M3) corresponds to the priority research topics identified in Table 4 of this Strategic Plan. NS means the research issue was not selected as one of the low-, medium-, or high-priority research needs in this Strategic Plan..

3. Characterization Issues	Strategic Research Documents^a	Recently Completed Work	Ongoing or Planned Work	FHWA Priority (as numbered in Table 4)
3.1 Evaluation and improvement of the performance of air quality models	FHWA P9, NARSTO, CENR, EMEP, NRC	X	X	L1
3.2 Understanding transportation emissions contribution to PM concentrations	FHWA P5	X	X	L4
3.3 Updating source profiles used in modeling	FHWA P4, CENR, NARSTO	X	X	NS
3.4 Separating diesel and gasoline PM contributions	CENR	X	X	NS
3.5 Estimating the contribution of transportation to PM exposure		X	X	NS

^a Project numbers (P#) are identified for areas identified in the 2000-2004 FHWA strategic work plan for PM research; see Appendix C for a summary listing of the 2000-2004 projects.

Table B-3. List of emissions research issues from the literature assessment (Table 4-2 of the literature assessment). Priorities are listed as high, medium, or low (H, M, or L); their number (e.g., M1, M2, or M3) corresponds to the priority research topics identified in Table 4 of this Strategic Plan. NS means the research issue was not selected as one of the low-, medium-, or high-priority research needs in this Strategic Plan.

4. Mobile Source Emissions Measurements	Strategic Research Documents^a	Recently Completed Work	Ongoing or Planned Work	FHWA Priority (as numbered in Table 4)
4.1 Exhaust Measurement Methodologies
4.1.1 Measurement of PM mass	NARSTO, NRC	X	X	NS
4.1.2 Measurement of ammonia	NARSTO, NRC	X	X	NS
4.1.3 Measurement of PM properties	NARSTO, NRC	X	X	NS
4.2 Collection of Exhaust Emissions Data
4.2.1 HDDV emissions	FHWA P6, NRC emissions modeling review	X	X	M9 and L7
4.2.2 Gross-emitting light-duty gasoline vehicles (LDGVs)	FHWA P7, NRC emissions modeling review	X	X	M9
4.2.3 Ammonia	CENR, NRC	X	X	NS
4.2.4 Ultrafines and speciated organics	NARSTO, NRC	X	X	L2
4.3 Collection of Fugitive Emissions Data				M1
4.3.1 Resuspended road surface material	FHWA P8, NARSTO	X	X
4.3.2 Direct emissions from brake wear and tire wear		X	X

^a Project numbers (P#) are identified for areas identified in the 2000-2004 FHWA strategic work plan for PM research; see Appendix C for a summary listing of the 2000-2004 projects.

Table B-4. List of modeling research issues from the literature assessment (Table 5-1 of the literature assessment). Priorities are listed as high, medium, or low (H, M, or L); their number (e.g., M1, M2, or M3) corresponds to the priority research topics identified in Table 4 of this Strategic Plan.

5. Emissions Models and Hotspot Models	Strategic Research Documents^a	Recently Completed Work	Ongoing or Planned Work	FHWA Priority (as numbered in Table 4)
5.1 Improving Emissions Modeling
5.1.1 Improvement of model input data	FHWA P10			M6
5.1.2 Development of new models	FHWA P9, P11; NARSTO; NRC emissions modeling review	X	X	H3
5.1.3 Model evaluations	FHWA P9, P11; NARSTO; NRC emissions modeling review	X	X	H3
5.2 PM Hot-spot Modeling
5.2.1 Development of hot-spot models		X	X	H2
5.2.2 Evaluation of hot-spot models		X	X	H2

^a Project numbers (P#) are identified for areas identified in the 2000-2004 FHWA strategic work plan for PM research; see Appendix C for a summary listing of the 2000-2004 projects.

Table B-5. List of control strategy research issues from the literature assessment (Table 6-1 of the literature assessment). Priorities are listed as high, medium, or low (H, M, or L); their number (e.g., M1, M2, or M3) corresponds to the priority research topics identified in Table 4 of this Strategic Plan.

6. Control Strategies	Strategic Research Documents^a	Recently Completed Work	Ongoing or Planned Work	FHWA Priority (as numbered in Table 4)
6.1 Control Strategy Compilations and Cost-Effectiveness Analyses				M2
6.1.1 Available compilations	FHWA P12, P13	X	X
6.1.2 Information quality and cost-effectiveness methodologies		X
6.2 Evaluations of Specific Control Types				H4
6.2.1 Transportation control measures (TCMs)	FHWA P12-P14	X	X
6.2.2 Emission control technology retrofits	FHWA P12-P14	X	X
6.2.3 Replacement of older vehicles with newer vehicles	FHWA P12-P14	X	X
6.2.4 Use of different fuels and lubricants	FHWA P12-P14	X	X
6.2.5 Vehicle inspection & maintenance (I&M)	FHWA P12-P14	X	X
6.2.6 Reductions in fugitive dust from roads	FHWA P12-P14	X	X

^a Project numbers (P#) are identified for areas identified in the 2000-2004 FHWA strategic work plan for PM research; see Appendix C for a summary listing of the 2000-2004 projects.

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