{"data":{"id":"us/40-cfr-appendix-e-to-subpart-s-of-part-51","jurisdiction":"us","citation":"40 CFR Appendix E to Subpart S of Part 51","heading":"Appendix E to Subpart S of Part 51—Transient Test Driving Cycle","body":"(I) Driver's trace. All excursions in the transient driving cycle shall be evaluated by the procedures defined in § 86.115-78(b)(1) and § 86.115(c) of this chapter. Excursions exceeding these limits shall cause a test to be void. In addition, provisions shall be available to utilize cycle validation criteria, as described in § 86.1341-90 of this chapter, for trace speed versus actual speed as a means to determine a valid test.\n(II) Driving cycle. The following table shows the time speed relationship for the transient IM240 test procedure.\nSecond MPH\n0 0\n1 0\n2 0\n3 0\n4 0\n5 3\n6 5.9\n7 8.6\n8 11.5\n9 14.3\n10 16.9\n11 17.3\n12 18.1\n13 20.7\n14 21.7\n15 22.4\n16 22.5\n17 22.1\n18 21.5\n19 20.9\n20 20.4\n21 19.8\n22 17\n23 14.9\n24 14.9\n25 15.2\n26 15.5\n27 16\n28 17.1\n29 19.1\n30 21.1\n31 22.7\n32 22.9\n33 22.7\n34 22.6\n35 21.3\n36 19\n37 17.1\n38 15.8\n39 15.8\n40 17.7\n41 19.8\n42 21.6\n43 23.2\n44 24.2\n45 24.6\n46 24.9\n47 25\n48 25.7\n49 26.1\n50 26.7\n51 27.5\n52 28.6\n53 29.3\n54 29.8\n55 30.1\n56 30.4\n57 30.7\n58 30.7\n59 30.5\n60 30.4\n61 30.3\n62 30.4\n63 30.8\n64 30.4\n65 29.9\n66 29.5\n67 29.8\n68 30.3\n69 30.7\n70 30.9\n71 31\n72 30.9\n73 30.4\n74 29.8\n75 29.9\n76 30.2\n77 30.7\n78 31.2\n79 31.8\n80 32.2\n81 32.4\n82 32.2\n83 31.7\n84 28.6\n85 25.1\n86 21.6\n87 18.1\n88 14.6\n89 11.1\n90 7.6\n91 4.1\n92 0.6\n93 0\n94 0\n95 0\n96 0\n97 0\n98 3.3\n99 6.6\n100 9.9\n101 13.2\n102 16.5\n103 19.8\n104 22.2\n105 24.3\n106 25.8\n107 26.4\n108 25.7\n109 25.1\n110 24.7\n111 25.2\n112 25.4\n113 27.2\n114 26.5\n115 24\n116 22.7\n117 19.4\n118 17.7\n119 17.2\n120 18.1\n121 18.6\n122 20\n123 20.7\n124 21.7\n125 22.4\n126 22.5\n127 22.1\n128 21.5\n129 20.9\n130 20.4\n131 19.8\n132 17\n133 17.1\n134 15.8\n135 15.8\n136 17.7\n137 19.8\n138 21.6\n139 22.2\n140 24.5\n141 24.7\n142 24.8\n143 24.7\n144 24.6\n145 24.6\n146 25.1\n147 25.6\n148 25.7\n149 25.4\n150 24.9\n151 25\n152 25.4\n153 26\n154 26\n155 25.7\n156 26.1\n157 26.7\n158 27.3\n159 30.5\n160 33.5\n161 36.2\n162 37.3\n163 39.3\n164 40.5\n165 42.1\n166 43.5\n167 45.1\n168 46\n169 46.8\n170 47.5\n171 47.5\n172 47.3\n173 47.2\n174 47.2\n175 47.4\n176 47.9\n177 48.5\n178 49.1\n179 49.5\n180 50\n181 50.6\n182 51\n183 51.5\n184 52.2\n185 53.2\n186 54.1\n187 54.6\n188 54.9\n189 55\n190 54.9\n191 54.6\n192 54.6\n193 54.8\n194 55.1\n195 55.5\n196 55.7\n197 56.1\n198 56.3\n199 56.6\n200 56.7\n201 56.7\n202 56.3\n203 56\n204 55\n205 53.4\n206 51.6\n207 51.8\n208 52.1\n209 52.5\n210 53\n211 53.5\n212 54\n213 54.9\n214 55.4\n215 55.6\n216 56\n217 56\n218 55.8\n219 55.2\n220 54.5\n221 53.6\n222 52.5\n223 51.5\n224 50.5\n225 48\n226 44.5\n227 41\n228 37.5\n229 34\n230 30.5\n231 27\n232 23.5\n233 20\n234 16.5\n235 13\n236 9.5\n237 6\n238 2.5\n239 0","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 51—REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS","Subpart S—Inspection/Maintenance Program Requirements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"0f8de44dfe2c0bad582f53efc330ac1d80765b0d49d8f74f23775e7f604d5489","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-appendix-d-to-subpart-s-of-part-51","next":"us/40-cfr-51.390"},"notice":"GroundRules: Original legal text. Not legal advice."}