40 CFR Part 600, Appendix I

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗

SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH
0	Sample On	50	38.6	100	48.5	150	44.1	200	43.4	250	48	300	33.4	350	59
1	0	51	39.3	101	48.8	151	44.3	201	43.2	251	48	301	35.6	351	58.9
2	0	52	40	102	49.1	152	44.4	202	43.2	252	48	302	37.5	352	58.8
3	2	53	40.7	103	49.2	153	44.6	203	43.1	253	48.1	303	39.1	353	58.6
4	4.9	54	41.4	104	49.1	154	44.7	204	43	254	48.2	304	40.2	354	58.4
5	8.1	55	42.2	105	49.1	155	44.9	205	43	255	48.2	305	41.1	355	58.2
6	11.3	56	42.9	106	49	156	45.2	206	43.1	256	48.1	306	41.8	356	58.1
7	14.5	57	43.5	107	49	157	45.7	207	43.4	257	48.6	307	42.4	357	58
8	17.3	58	44	108	49.1	158	45.9	208	43.9	258	48.9	308	42.8	358	57.9
9	19.6	59	44.3	109	49.2	159	46.3	209	44	259	49.1	309	43.3	359	57.6
10	21.8	60	44.5	110	49.3	160	46.8	210	43.5	260	49.1	310	43.8	360	57.4
11	24	61	44.8	111	49.4	161	46.9	211	42.6	261	49.1	311	44.3	361	57.2
12	25.8	62	44.9	112	49.5	162	47	212	41.5	262	49.1	312	44.7	362	57.1
13	27.1	63	45	113	49.5	163	47.1	213	40.7	263	49.1	313	45	363	57
14	28	64	45.1	114	49.5	164	47.6	214	40	264	49	314	45.2	364	57
15	29	65	45.4	115	49.4	165	47.9	215	40	265	48.9	315	45.4	365	56.9
16	30	66	45.7	116	49.1	166	48	216	40.3	266	48.2	316	45.5	366	56.9
17	30.7	67	46	117	48.9	167	48	217	41	267	47.7	317	45.8	367	56.9
18	31.5	68	46.3	118	48.6	168	47.9	218	42	268	47.5	318	46	368	57
19	32.2	69	46.5	119	48.4	169	47.8	219	42.7	269	47.2	319	46.1	369	57
20	32.9	70	46.8	120	48.1	170	47.3	220	43.1	270	46.7	320	46.5	370	57
21	33.5	71	46.9	121	47.7	171	46.7	221	43.2	271	46.2	321	46.8	371	57
22	34.1	72	47	122	47.4	172	46.2	222	43.4	272	46	322	47.1	372	57
23	34.6	73	47.1	123	47.3	173	45.9	223	43.9	273	45.8	323	47.7	373	57
24	34.9	74	47.2	124	47.5	174	45.7	224	44.3	274	45.6	324	48.3	374	57
25	35.1	75	47.3	125	47.8	175	45.5	225	44.7	275	45.4	325	49	375	57
26	35.7	76	47.2	126	47.9	176	45.4	226	45.1	276	45.2	326	49.7	376	57
27	35.9	77	47.1	127	48	177	45.3	227	45.4	277	45	327	50.3	377	56.9
28	35.8	78	47	128	47.9	178	45	228	45.8	278	44.7	328	51	378	56.8
29	35.3	79	46.9	129	47.9	179	44	229	46.5	279	44.5	329	51.7	379	56.5
30	34.9	80	46.9	130	47.9	180	43.1	230	46.9	280	44.2	330	52.4	380	56.2
31	34.5	81	46.9	131	48	181	42.2	231	47.2	281	43.5	331	53.1	381	56
32	34.6	82	47	132	48	182	41.5	232	47.4	282	42.8	332	53.8	382	56
33	34.8	83	47.1	133	48	183	41.5	233	47.3	283	42	333	54.5	383	56
34	35.1	84	47.1	134	47.9	184	42.1	234	47.3	284	40.1	334	55.2	384	56.1
35	35.7	85	47.2	135	47.3	185	42.9	235	47.2	285	38.6	335	55.8	385	56.4
36	36.1	86	47.1	136	46	186	43.5	236	47.2	286	37.5	336	56.4	386	56.7
37	36.2	87	47	137	43.3	187	43.9	237	47.2	287	35.8	337	56.9	387	56.9
38	36.5	88	46.9	138	41.2	188	43.6	238	47.1	288	34.7	338	57	388	57.1
39	36.7	89	46.5	139	39.5	189	43.3	239	47	289	34	339	57.1	389	57.3
40	36.9	90	46.3	140	39.2	190	43	240	47	290	33.3	340	57.3	390	57.4
41	37	91	46.2	141	39	191	43.1	241	46.9	291	32.5	341	57.6	391	57.4
42	37	92	46.3	142	39	192	43.4	242	46.8	292	31.7	342	57.8	392	57.2
43	37	93	46.5	143	39.1	193	43.9	243	46.9	293	30.6	343	58	393	57
44	37	94	46.9	144	39.5	194	44.3	244	47	294	29.6	344	58.1	394	56.9
45	37	95	47.1	145	40.1	195	44.6	245	47.2	295	28.8	345	58.4	395	56.6
46	37	96	47.4	146	41	196	44.9	246	47.5	296	28.4	346	58.7	396	56.3
47	37.1	97	47.7	147	42	197	44.8	247	47.9	297	28.6	347	58.8	397	56.1
48	37.3	98	48	148	43.1	198	44.4	248	48	298	29.5	348	58.9	398	56.4
49	37.8	99	48.2	149	43.7	199	43.9	249	48	299	31.4	349	59	399	56.7
SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH	SEC	MPH
400	57.1	450	58.2	500	54.7	550	55.8	600	48.3	650	50.2	700	54.2	750	26.8
401	57.5	451	58.1	501	54.6	551	55.6	601	48	651	50.7	701	54.5	751	24.5
402	57.8	452	58	502	54.4	552	55.4	602	47.9	652	51.1	702	54.8	752	21.5
403	58	453	58	503	54.3	553	55.2	603	47.8	653	51.7	703	55	753	19.5
404	58	454	58	504	54.3	554	55.1	604	47.7	654	52.2	704	55.5	754	17.4
405	58	455	58	505	54.2	555	55	605	47.9	655	52.5	705	55.9	755	15.1
406	58	456	58	506	54.1	556	54.9	606	48.3	656	52.1	706	56.1	756	12.4
407	58	457	58	507	54.1	557	54.6	607	49	657	51.6	707	56.3	757	9.7
408	58	458	57.9	508	54.1	558	54.4	608	49.1	658	51.1	708	56.4	758	7
409	57.9	459	57.9	509	54	559	54.2	609	49	659	51	709	56.5	759	5
410	57.8	460	58	510	54	560	54.1	610	48.9	660	51	710	56.7	760	3.3
411	57.7	461	58.1	511	54	561	53.8	611	48	661	51.1	711	56.9	761	2
412	57.7	462	58.1	512	54	562	53.4	612	47.1	662	51.4	712	57	762	0.7
413	57.8	463	58.2	513	54	563	53.3	613	46.2	663	51.7	713	57.3	763	0
414	57.9	464	58.3	514	54	564	53.1	614	46.1	664	52	714	57.7	764	0
415	58	465	58.3	515	54	565	52.9	615	46.1	665	52.2	715	58.2	765	Sample Off
416	58.1	446	58.3	516	54	566	52.6	616	46.2	666	52.5	716	58.8
417	58.4	467	58.2	517	54.1	567	52.4	617	46.9	667	52.8	717	59.1
418	58.9	468	58.1	518	54.2	568	52.2	618	47.8	668	52.7	718	59.2
419	59.1	469	58	519	54.5	569	52.1	619	49	669	52.6	719	59.1
420	59.4	470	57.8	520	54.8	570	52	620	49.7	670	52.3	720	58.8
421	59.8	471	57.5	521	54.9	571	52	621	50.6	671	52.3	721	58.5
422	59.9	472	57.1	522	55	572	52	622	51.5	672	52.4	722	58.1
423	59.9	473	57	523	55.1	573	52	623	52.2	673	52.5	723	57.7
424	59.8	474	56.6	524	55.2	574	52.1	624	52.7	674	52.7	724	57.3
425	59.6	475	56.1	525	55.2	575	52	625	53	675	52.7	725	57.1
426	59.4	476	56	526	55.3	576	52	626	53.6	676	52.4	726	56.8
427	59.2	477	55.8	527	55.4	577	51.9	627	54	677	52.1	727	56.5
428	59.1	478	55.5	528	55.5	578	51.6	628	54.1	678	51.7	728	56.2
429	59	479	55.2	529	55.6	579	51.4	629	54.4	679	51.1	729	55.5
430	58.9	480	55.1	530	55.7	580	51.1	630	54.7	680	50.5	730	54.6
431	58.7	481	55	531	55.8	581	50.7	631	55.1	681	50.1	731	54.1
432	58.6	482	54.9	532	55.9	582	50.3	632	55.4	682	49.8	732	53.7
433	58.5	483	54.9	533	56	583	49.8	633	55.4	683	49.7	733	53.2
434	58.4	484	54.9	534	56	584	49.3	634	55	684	49.6	734	52.9
435	58.4	485	54.9	535	56	585	48.7	635	54.5	685	49.5	735	52.5
436	58.3	486	54.9	536	56	586	48.2	6.36	53.6	686	49.5	736	52
437	58.2	487	54.9	537	56	587	48.1	637	52.5	687	49.7	737	51.3
438	58.1	488	55	538	56	588	48	638	50.2	688	50	738	50.5
439	58	489	55	539	56	589	48	6.39	48.2	689	50.2	739	49.5
440	57.9	490	55	540	56	590	48.1	640	46.5	690	50.6	740	48.5
441	57.9	491	55	541	56	591	48.4	641	46.2	691	51.1	741	47.6
442	57.9	492	55	542	56	592	48.9	642	46	692	51.6	742	46.8
443	57.9	493	55	543	56	593	49	643	46	693	51.9	743	45.6
444	57.9	494	55.1	544	56	594	49.1	644	46.3	694	52	744	44.2
445	58	495	55.1	545	56	595	49.1	645	46.8	695	52.1	745	42.5
446	58.1	496	55	546	56	596	49	646	47.5	696	52.4	746	39.2
447	58.1	497	54.9	547	55.9	597	49	647	48.2	697	52.9	747	35.9
448	58.2	498	54.9	548	55.9	598	48.9	648	48.8	698	53.3	748	32.6
449	58.2	499	54.8	549	55.9	599	48.6	649	49.5	699	53.7	749	29.3

[42 FR 45667, Sept. 12, 1977]