{"data":{"id":"us/40-cfr-appendix-a-to-part-1037","jurisdiction":"us","citation":"40 CFR Appendix A to Part 1037","heading":"Appendix A to Part 1037 — Heavy-Duty Transient Test Cycle","body":"Time (sec) Speed (mi/hr)\n1 0.00\n2 0.00\n3 0.00\n4 0.00\n5 0.00\n6 0.00\n7 0.41\n8 1.18\n9 2.26\n10 3.19\n11 3.97\n12 4.66\n13 5.32\n14 5.94\n15 6.48\n16 6.91\n17 7.28\n18 7.64\n19 8.02\n20 8.36\n21 8.60\n22 8.74\n23 8.82\n24 8.82\n25 8.76\n26 8.66\n27 8.58\n28 8.52\n29 8.46\n30 8.38\n31 8.31\n32 8.21\n33 8.11\n34 8.00\n35 7.94\n36 7.94\n37 7.80\n38 7.43\n39 6.79\n40 5.81\n41 4.65\n42 3.03\n43 1.88\n44 1.15\n45 1.14\n46 1.12\n47 1.11\n48 1.19\n49 1.57\n50 2.31\n51 3.37\n52 4.51\n53 5.56\n54 6.41\n55 7.09\n56 7.59\n57 7.99\n58 8.32\n59 8.64\n60 8.91\n61 9.13\n62 9.29\n63 9.40\n64 9.39\n65 9.20\n66 8.84\n67 8.35\n68 7.81\n69 7.22\n70 6.65\n71 6.13\n72 5.75\n73 5.61\n74 5.65\n75 5.80\n76 5.95\n77 6.09\n78 6.21\n79 6.31\n80 6.34\n81 6.47\n82 6.65\n83 6.88\n84 7.04\n85 7.05\n86 7.01\n87 6.90\n88 6.88\n89 6.89\n90 6.96\n91 7.04\n92 7.17\n93 7.29\n94 7.39\n95 7.48\n96 7.57\n97 7.61\n98 7.59\n99 7.53\n100 7.46\n101 7.40\n102 7.39\n103 7.38\n104 7.37\n105 7.37\n106 7.39\n107 7.42\n108 7.43\n109 7.40\n110 7.39\n111 7.42\n112 7.50\n113 7.57\n114 7.60\n115 7.60\n116 7.61\n117 7.64\n118 7.68\n119 7.74\n120 7.82\n121 7.90\n122 7.96\n123 7.99\n124 8.02\n125 8.01\n126 7.87\n127 7.59\n128 7.20\n129 6.52\n130 5.53\n131 4.36\n132 3.30\n133 2.50\n134 1.94\n135 1.56\n136 0.95\n137 0.42\n138 0.00\n139 0.00\n140 0.00\n141 0.00\n142 0.00\n143 0.00\n144 0.00\n145 0.00\n146 0.00\n147 0.00\n148 0.00\n149 0.00\n150 0.00\n151 0.00\n152 0.00\n153 0.00\n154 0.00\n155 0.00\n156 0.00\n157 0.00\n158 0.00\n159 0.00\n160 0.00\n161 0.00\n162 0.00\n163 0.00\n164 0.00\n165 0.00\n166 0.00\n167 0.00\n168 0.00\n169 0.00\n170 0.00\n171 0.00\n172 1.11\n173 2.65\n174 4.45\n175 5.68\n176 6.75\n177 7.59\n178 7.75\n179 7.63\n180 7.67\n181 8.70\n182 10.20\n183 11.92\n184 12.84\n185 13.27\n186 13.38\n187 13.61\n188 14.15\n189 14.84\n190 16.49\n191 18.33\n192 20.36\n193 21.47\n194 22.35\n195 22.96\n196 23.46\n197 23.92\n198 24.42\n199 24.99\n200 25.91\n201 26.26\n202 26.38\n203 26.26\n204 26.49\n205 26.76\n206 27.07\n207 26.64\n208 25.99\n209 24.77\n210 24.04\n211 23.39\n212 22.73\n213 22.16\n214 21.66\n215 21.39\n216 21.43\n217 20.67\n218 17.98\n219 13.15\n220 7.71\n221 3.30\n222 0.88\n223 0.00\n224 0.00\n225 0.00\n226 0.00\n227 0.00\n228 0.00\n229 0.00\n230 0.00\n231 0.00\n232 0.00\n233 0.00\n234 0.00\n235 0.00\n236 0.00\n237 0.00\n238 0.00\n239 0.00\n240 0.00\n241 0.00\n242 0.00\n243 0.00\n244 0.00\n245 0.00\n246 0.00\n247 0.00\n248 0.00\n249 0.00\n250 0.00\n251 0.00\n252 0.00\n253 0.00\n254 0.00\n255 0.00\n256 0.00\n257 0.00\n258 0.00\n259 0.50\n260 1.57\n261 3.07\n262 4.57\n263 5.65\n264 6.95\n265 8.05\n266 9.13\n267 10.05\n268 11.62\n269 12.92\n270 13.84\n271 14.38\n272 15.64\n273 17.14\n274 18.21\n275 18.90\n276 19.44\n277 20.09\n278 21.89\n279 24.15\n280 26.26\n281 26.95\n282 27.03\n283 27.30\n284 28.10\n285 29.44\n286 30.78\n287 32.09\n288 33.24\n289 34.46\n290 35.42\n291 35.88\n292 36.03\n293 35.84\n294 35.65\n295 35.31\n296 35.19\n297 35.12\n298 35.12\n299 35.04\n300 35.08\n301 35.04\n302 35.34\n303 35.50\n304 35.77\n305 35.81\n306 35.92\n307 36.23\n308 36.42\n309 36.65\n310 36.26\n311 36.07\n312 35.84\n313 35.96\n314 36.00\n315 35.57\n316 35.00\n317 34.08\n318 33.39\n319 32.20\n320 30.32\n321 28.48\n322 26.95\n323 26.18\n324 25.38\n325 24.77\n326 23.46\n327 22.39\n328 20.97\n329 20.09\n330 18.90\n331 18.17\n332 16.48\n333 15.07\n334 12.23\n335 10.08\n336 7.71\n337 7.32\n338 8.63\n339 10.77\n340 12.65\n341 13.88\n342 15.03\n343 15.64\n344 16.99\n345 17.98\n346 19.13\n347 18.67\n348 18.25\n349 18.17\n350 18.40\n351 19.63\n352 20.32\n353 21.43\n354 21.47\n355 21.97\n356 22.27\n357 22.69\n358 23.15\n359 23.69\n360 23.96\n361 24.27\n362 24.34\n363 24.50\n364 24.42\n365 24.38\n366 24.31\n367 24.23\n368 24.69\n369 25.11\n370 25.53\n371 25.38\n372 24.58\n373 23.77\n374 23.54\n375 23.50\n376 24.15\n377 24.30\n378 24.15\n379 23.19\n380 22.50\n381 21.93\n382 21.85\n383 21.55\n384 21.89\n385 21.97\n386 21.97\n387 22.01\n388 21.85\n389 21.62\n390 21.62\n391 22.01\n392 22.81\n393 23.54\n394 24.38\n395 24.80\n396 24.61\n397 23.12\n398 21.62\n399 19.90\n400 18.86\n401 17.79\n402 17.25\n403 16.91\n404 16.75\n405 16.75\n406 16.87\n407 16.37\n408 16.37\n409 16.49\n410 17.21\n411 17.41\n412 17.37\n413 16.87\n414 16.72\n415 16.22\n416 15.76\n417 14.72\n418 13.69\n419 12.00\n420 10.43\n421 8.71\n422 7.44\n423 5.71\n424 4.22\n425 2.30\n426 1.00\n427 0.00\n428 0.61\n429 1.19\n430 1.61\n431 1.53\n432 2.34\n433 4.29\n434 7.25\n435 10.20\n436 12.46\n437 14.53\n438 16.22\n439 17.87\n440 19.74\n441 21.01\n442 22.23\n443 22.62\n444 23.61\n445 24.88\n446 26.15\n447 26.99\n448 27.56\n449 28.18\n450 28.94\n451 29.83\n452 30.78\n453 31.82\n454 32.78\n455 33.24\n456 33.47\n457 33.31\n458 33.08\n459 32.78\n460 32.39\n461 32.13\n462 31.82\n463 31.55\n464 31.25\n465 30.94\n466 30.71\n467 30.56\n468 30.79\n469 31.13\n470 31.55\n471 31.51\n472 31.47\n473 31.44\n474 31.51\n475 31.59\n476 31.67\n477 32.01\n478 32.63\n479 33.39\n480 34.31\n481 34.81\n482 34.20\n483 32.39\n484 30.29\n485 28.56\n486 26.45\n487 24.79\n488 23.12\n489 20.73\n490 18.33\n491 15.72\n492 13.11\n493 10.47\n494 7.82\n495 5.70\n496 3.57\n497 0.92\n498 0.00\n499 0.00\n500 0.00\n501 0.00\n502 0.00\n503 0.00\n504 0.00\n505 0.00\n506 0.00\n507 0.00\n508 0.00\n509 0.00\n510 0.00\n511 0.00\n512 0.00\n513 0.00\n514 0.00\n515 0.00\n516 0.00\n517 0.00\n518 0.00\n519 0.00\n520 0.00\n521 0.00\n522 0.50\n523 1.50\n524 3.00\n525 4.50\n526 5.80\n527 6.52\n528 6.75\n529 6.44\n530 6.17\n531 6.33\n532 6.71\n533 7.40\n534 7.67\n535 7.33\n536 6.71\n537 6.41\n538 6.60\n539 6.56\n540 5.94\n541 5.45\n542 5.87\n543 6.71\n544 7.56\n545 7.59\n546 7.63\n547 7.67\n548 7.67\n549 7.48\n550 7.29\n551 7.29\n552 7.40\n553 7.48\n554 7.52\n555 7.52\n556 7.48\n557 7.44\n558 7.28\n559 7.21\n560 7.09\n561 7.06\n562 7.29\n563 7.75\n564 8.55\n565 9.09\n566 10.04\n567 11.12\n568 12.46\n569 13.00\n570 14.26\n571 15.37\n572 17.02\n573 18.17\n574 19.21\n575 20.17\n576 20.66\n577 21.12\n578 21.43\n579 22.66\n580 23.92\n581 25.42\n582 25.53\n583 26.68\n584 28.14\n585 30.06\n586 30.94\n587 31.63\n588 32.36\n589 33.24\n590 33.66\n591 34.12\n592 35.92\n593 37.72\n594 39.26\n595 39.45\n596 39.83\n597 40.18\n598 40.48\n599 40.75\n600 41.02\n601 41.36\n602 41.79\n603 42.40\n604 42.82\n605 43.05\n606 43.09\n607 43.24\n608 43.59\n609 44.01\n610 44.35\n611 44.55\n612 44.82\n613 45.05\n614 45.31\n615 45.58\n616 46.00\n617 46.31\n618 46.54\n619 46.61\n620 46.92\n621 47.19\n622 47.46\n623 47.54\n624 47.54\n625 47.54\n626 47.50\n627 47.50\n628 47.50\n629 47.31\n630 47.04\n631 46.77\n632 45.54\n633 43.24\n634 41.52\n635 39.79\n636 38.07\n637 36.34\n638 34.04\n639 32.45\n640 30.86\n641 28.83\n642 26.45\n643 24.27\n644 22.04\n645 19.82\n646 17.04\n647 14.26\n648 11.52\n649 8.78\n650 7.17\n651 5.56\n652 3.72\n653 3.38\n654 3.11\n655 2.58\n656 1.66\n657 0.67\n658 0.00\n659 0.00\n660 0.00\n661 0.00\n662 0.00\n663 0.00\n664 0.00\n665 0.00\n666 0.00\n667 0.00\n668 0.00","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1037—CONTROL OF EMISSIONS FROM NEW HEAVY-DUTY MOTOR VEHICLES"],"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":"accf3dccc9b87f3d825c6650d01fcb3e492cdde9fcd831844f162518e705534d","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1037.825","next":"us/40-cfr-appendix-b-to-part-1037"},"notice":"GroundRules: Original legal text. Not legal advice."}