Chapter 6 Mobility Standards Appendix 6E Guidelines for Traffic Impact Studies and Air Quality Analysis Page6 of 6

APPENDIX E
AIR POLLUTION CONTROL DISTRICT EMISSION FACTORS

Emission factors for air quality analysis in Jefferson County are presented in the following tables. Table E-1 contains the carbon monoxide emission factor during the operating mode (when vehicle is in motion) and Table E-2 shows the emission factors to vising when the vehicles are in the idling mode of operation. The factors are provided by the Air Pollution Control District and may not be changed without prior approval. The factors were generated using MOBILE 5a and MOBILE 4. Ic.

TABLE E-1
CO EMISSION FACTORS
(GRAMS PER MILE)
1990- 2000

MOBILE 5a (Version 26 Mar 93) Emission Factors –Carbon Monoxide (CO) SIP 93 Method 07-27-93 Composite Emission Factors WINTER Jefferson County WINTER Jefferson County

GM/MI @ MPH	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
3	233.533	217.272	199.029	177.538	166.651	138	131.331	124.476	117.334	110.642	105.354
4	179.842	167.317	153.561	137.29	129.07	107.053	101.968	96.792	91.472	86.494	82.555
5	146.37	136.359	125.478	112.528	106.016	88.125	84.056	79.936	75.747	71.83	68.725
6	123.499	115.274	106.388	95.732	90.403	75.326	71.964	68.57	65.151	61.958	59.42
8	94.368	88.461	82.136	74.41	70.602	59.1	56.652	54.192	51.753	49.48	47.66
10	76.715	72.201	67.426	61.47	58.583	49.241	47.351	45.46	43.619	41.903	40.519
12	64.943	61.336	57.586	52.801	50.523	42.615	41.1	39.591	38.15	36.808	35.713
14	56.555	53.577	50.552	46.592	44.745	37.857	36.61	35.374	34.219	33.144	32.256
16	50.267	47.753	45.267	41.922	40.396	34.272	33.225	32.195	31.255	30.381	29.649
18	45.357	43.207	41.139	38.274	36.998	31.47	30.58	29.711	28.939	28.222	27.613
20	41.495	39.618	37.846	35.309	34.197	29.11	28.31	27.529	26.852	26.233	25.695
25	34.687	33.026	31.443	29.186	28.147	23.823	23.059	22.297	21.587	20.905	20.312
30	29.951	28.492	27.064	25.025	24.052	20.262	19.531	18.788	18.059	17.342	16.72
35	26.565	25.259	23.945	22.065	21.141	17.734	17.026	16.296	15.552	14.809	14.165
40	24.198	22.971	21.719	19.936	19.033	15.894	15.195	14.467	13.707	12.938	12.274
45	22.612	21.386	20.15	18.407	17.502	14.54	13.834	13.099	12.319	11.522	10.833
50	21.955	20.702	19.458	17.718	16.801	13.912	13.196	12.45	11.655	10.84	10.136
55	22.087	20.821	19.564	17.811	16.886	13.983	13.259	12.506	11.705	10.885	10.176
60	41.464	38.352	35.354	31.501	29.316	23.726	22.099	20.438	18.782	17.144	15.764
65	61.001	56.028	51.273	45.307	41.852	33.557	31.017	28441	25.921	23.46	21.405
I/HR	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
IDLE	695.282	647.185	593.062	529.524	497.456	411.267	391.261	370.839	349.449	329.468	313.411

TABLE E-1 (CONTINUED)
CO EMISSION FACTORS
(GRAMS PER MILE)
2000-2010

MOBILE 5a (Version 26 Mar 93) Emission Factors –Carbon Monoxide (CO) SIP 93 Method 07-27-93 Composite Emission Factors WINTER Jefferson County

GM/MI @ MPH	2000	2002	2004	2006	2008	2010	2012	2014	2016	2018	2020
3	105.354	99.169	95.12	92.714	91.138	90.018	88.161	88.051	87.977	87.914	87.88
4	82.555	77.929	74.926	73.145	71.972	71.149	69.851	69.764	69.705	69.657	69.62
5	68.725	65.065	62.703	61.298	60.37	59.726	58.731	58.66	58.611	58.569	58.54
6	59.42	56.417	54.489	53.338	52.573	52.049	51.236	51.174	51.131	51.096	51.07
8	47.66	45.495	44.118	43.287	42.73	42.356	41.735	41.684	41.649	41.62	41.6
10	40.519	38.862	37.822	37.187	36.755	36.472	35.937	35.894	35.864	35.839	35.82
12	35.713	34.397	33.585	33.084	32735	32.515	32.022	31.983	31.957	31.934	31.92
14	32.256	31.185	30.538	30.132	29.844	29.667	29.197	29.162	29.138	29.117	29.1
16	29.649	28.763	28.24	27.906	27.664	27.52	27.063	27.03	27.008	26.988	26.97
18	27.613	26.871	26.445	26.168	25.962	25.843	25.395	25.365	25.343	25.325	25.31
20	25.695	25.028	24.646	24.395	24.205	24.099	23.665	23.634	23.614	23.596	23.58
25	20.312	19.562	19.12	18.836	18.631	18.504	18.151	18.121	18.105	18.091	18.08
30	16.72	15.921	15.44	15.133	14.918	14.776	14.483	14.454	14.44	14.43	14.42
35	14.165	13.33	12.821	12.498	12.275	12.123	11.879	11.851	11.838	11.83	11.82
40	12.274	11.406	10.872	10.536	10.307	10.147	9.9948	9.92	9.91	9.902	9.89
45	10.833	9.931	9.375	9.029	8.794	8.628	8.472	8.445	8.435	8.429	8.42
50	10.136	9.211	8.642	8.289	8.053	7.883	7.762	7.734	7.725	7.72	7.71
55	10.176	9.245	8.672	8.318	8.081	7.91	7.816	7.789	7.779	7.774	7.77
60	15.764	13.954	12.82	12.127	11.672	11.351	11.141	11.098	11.085	11.077	11.07
65	21.405	18.707	17.007	15.975	15.302	14.828	14.53	14.471	14.454	14.444	14.43
I/HR	2000	2002	2004	2006	2008	2010	2012	2014	2016	2018	2020
IDLE	313.411	294.734	282.911	275.633	270.664	267.293	258.158	257.826	257.607	257.425	257.33

All Rates are subject to future modification by the Air Pollution Control District as new information becomes available.

(Derivation of above values is described below under Table E-2)

CO IDLE EMISSION FACTORS
(GRAMS PER MINUTE)

1990-2010

24 Feb 1992 MOBILE version 4.1c (4 Nov 91)

Year	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
IDLE	9.019	8.111	7.354	6.735	6.214	5.708	5.191	4.734	4.349	4.050	3.781
Year	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010
IDLE	3.781	3.558	3.380	3.245	3.068	2.994	2.929	2.867	2.836	2.794	2.773

All Rates are subject to future modification by the Air Pollution Control District as new information becomes available.

Derivation of Tables E-l. and E-2;

Vehicle emissions per mile and idle emissions per minute from results of MOBILE 5a and MOBILE 4.1c (version of 4 Nov 91) model runs as prepared by APCDJC personnel to reflect reasonable predictions of future emissions rates. MOBILE 5a model default registration distribution is used. RVP of local gasoline is set to 15.0 as a realistic winter supply condition. The temperature used by the model was 28.5 degrees Fahrenheit, determined to be the average minimum daily temperature for January 1992, and reflects reasonable expectations of real-world low temperatures (CO emissions go up when temperature goes down).

The model assumed that an inspection/maintenance program equivalent to the EPA minimum performance-based standard is implemented for all vehicles in the area for all years. This specification does not take into account local improvements over title minimum I/M program but is realistic and meaningful, since the Clean Air Act mandates the minimum specification or better in all covered areas, and thus emission rates should be NO HIGHER than those shown. Using the minimum standard allows for more stable predictions of the future, since as-yet-undetermined program variations are ignored.

These assumptions should be adequate for the intended purpose of evaluating individual land-use or transportation projects. Only changes in the MOBILE model version should bring about a need to revise these rate tables.

APPENDIX F TECHNICAL REFERENCE

Manual of Traffic Engineering Studies. Box, Paul C. and Joseph C. Oppenlander, Institute of Transportation Engineers, Washington, D.C., 1976
Quick Response Urban Travel Estimation Techniques and Transferable Parameters: User Guide. NCHRP Report 187, Sosslau A.B., et al., National Cooperative Highway Research Program, Transportation Research Board, 1978.
Trip Generation. 5th edition, Institute of Transportation Engineers, Washington, D.C., 1991
Local Trip Generation Study. Barton Aschman Associates, Inc., October 1993,
Development and Application of Trip Generation Rates, Mehra, Joe and C. Richard Keller, Federal Highway Administration, Washington, D.C. 1985.
Highway Capacity Manual. Special Report 209, Transportation Research Board, Washington, D.C., 1985.
Manual on Uniform Traffic Control Devices. National Committee on Uniform Traffic Control Devices, U.S. Department of Transportation, Federal Highway Administration, 1978.
Transportation and Traffic Engineering Handbook. 2nd. Edition, Institute of Transportation Engineers, Washington, D.C., 1982.
User's Guide to CAL3OHC. U.S. Environmental Protection Agency, Technical Support Division, Research Triangle Park, N.C. July, 1990.
Traffic Engineering Handbook. 4th edition, Institute of Transportation Engineers, Washington, D.C. 1992
Transportation Planning Handbook. 1st edition Institute of Transportation Engineers, Washington, D.C., 1992