Code of Federal Regulations > Title 40 > Chapter I > Part 1037 > Subpart I > Appendix Appendix D - Appendix D to Part 1037—Heavy-Duty Grade Profile for Steady-State Test Cycles

Regulations last checked for updates: Mar 14, 2025

Title 40 - Protection of Environment last revised: Nov 14, 2025

Appendix Appendix D - Appendix D to Part 1037—Heavy-Duty Grade Profile for Steady-State Test Cycles

The following table identifies a grade profile for operating vehicles over the highway cruise cycles specified in subpart F of this part. Determine intermediate values by linear interpolation.

Distance (m)	Grade (%)
0	0
402	0
804	0.5
1206	0
1210	0
1222	−0.10
1234	0
1244	0
1294	0.36
1344	0
1354	0
1408	−0.28
1504	−1.04
1600	−0.28
1654	0
1666	0
1792	0.39
1860	0.66
1936	1.15
2098	2.44
2260	1.15
2336	0.66
2404	0.39
2530	0
2548	0
2732	−0.46
2800	−0.69
2880	−1.08
2948	−1.53
3100	−2.75
3252	−1.53
3320	−1.08
3400	−0.69
3468	−0.46
3652	0
3666	0
3742	0.35
3818	0.90
3904	1.59
3990	0.90
4066	0.35
4142	0
4158	0
4224	−0.10
4496	−0.69
4578	−0.97
4664	−1.36
4732	−1.78
4916	−3.23
5100	−1.78
5168	−1.36
5254	−0.97
5336	−0.69
5608	−0.10
5674	0
5724	0
5808	0.10
5900	0.17
6122	0.38
6314	0.58
6454	0.77
6628	1.09
6714	1.29
6838	1.66
6964	2.14
7040	2.57
7112	3.00
7164	3.27
7202	3.69
7292	5.01
7382	3.69
7420	3.27
7472	3.00
7544	2.57
7620	2.14
7746	1.66
7870	1.29
7956	1.09
8130	0.77
8270	0.58
8462	0.38
8684	0.17
8776	0.10
8860	0
8904	0
9010	−0.38
9070	−0.69
9254	−2.13
9438	−0.69
9498	−0.38
9604	0
9616	0
9664	0.26
9718	0.70
9772	0.26
9820	0
9830	0
9898	−0.34
10024	−1.33
10150	−0.34
10218	0
10228	0
10316	0.37
10370	0.70
10514	1.85
10658	0.70
10712	0.37
10800	0
10812	0
10900	−0.37
10954	−0.7
11098	−1.85
11242	−0.70
11296	−0.37
11384	0
11394	0
11462	0.34
11588	1.33
11714	0.34
11782	0
11792	0
11840	−0.26
11894	−0.70
11948	−0.26
11996	0
12008	0
12114	0.38
12174	0.69
12358	2.13
12542	0.69
12602	0.38
12708	0
12752	0
12836	−0.10
12928	−0.17
13150	−0.38
13342	−0.58
13482	−0.77
13656	−1.09
13742	−1.29
13866	−1.66
13992	−2.14
14068	−2.57
14140	−3.00
14192	−3.27
14230	−3.69
14320	−5.01
14410	−3.69
14448	−3.27
14500	−3.00
14572	−2.57
14648	−2.14
14774	−1.66
14898	−1.29
14984	−1.09
15158	−0.77
15298	−0.58
15490	−0.38
15712	−0.17
15804	−0.10
15888	0
15938	0
16004	0.10
16276	0.69
16358	0.97
16444	1.36
16512	1.78
16696	3.23
16880	1.78
16948	1.36
17034	0.97
17116	0.69
17388	0.10
17454	0
17470	0
17546	−0.35
17622	−0.90
17708	−1.59
17794	−0.90
17870	−0.35
17946	0
17960	0
18144	0.46
18212	0.69
18292	1.08
18360	1.53
18512	2.75
18664	1.53
18732	1.08
18812	0.69
18880	0.46
19064	0
19082	0
19208	−0.39
19276	−0.66
19352	−1.15
19514	−2.44
19676	−1.15
19752	−0.66
19820	−0.39
19946	0
19958	0
20012	0.28
20108	1.04
20204	0.28
20258	0
20268	0
20318	−0.36
20368	0
20378	0
20390	0.10
20402	0
20406	0
20808	−0.50
21210	0
21612	0

[89 FR 29793, Apr. 22, 2024]

authority: 42 U.S.C. 7401—7671q

source: 81 FR 74048, Oct. 25, 2016, unless otherwise noted.