33:
187:(MUTCD), since the early 1970s, all numbered highways in the U.S. are striped by color to show the direction of traffic flow. Two-way undivided roads have a yellow center line (and, if there are baseline shoulder stripes, they are solid white on both sides). This center line may be solid, broken, or a combination of the two, with the different styles, denoting whether
213:
These roads almost always have an odd number of lanes overall, usually five (two lanes in each direction with a central turning lane), but three-lane and seven-lane versions are not uncommon. Central turn lanes are most frequently built in suburban commercial areas where there are a large number of
194:
Multilane roads use broken white lines between lanes moving in the same direction; at least one solid yellow line lies to the left of the lane which borders traffic moving in the opposite direction, and the right sideline is solid white. Drivers can always tell the direction of the traffic flow by
209:
Since successful experiments in the late 1960s, some urban undivided highways in the U.S. have had a central left-turn lane used by both directions of flow. Essentially, this configuration puts a turning lane in the position of where a median would be if the road were divided.
169:
No equivalent term exists in
American English. A single carriage motorway in the U.S. would be termed an "undivided highway"; this is likely to mean a multi-lane road with only striping (paint) (but no median) between the two directions of
101:
248:
122:
157:
areas, only applies in places where a lower numeric speed limit is not in place. The UK has one major single-carriageway motorway, the
1703:
183:
354:
150:
141:
have a general speed limit of 80 km/h (50 mph). In urban areas, the general speed limit is 50 km/h (30 mph).
153:
for single-carriageway roads is lower than the maximum for dual-carriageway roads. The
National Speed Limit, which is lower for
462:
407:
80:
is a type of single carriageway with a single lane with passing places for traffic in both directions. An undivided highway (
1698:
292:
1708:
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17:
1672:
802:
767:
1677:
792:
777:
392:
1654:
1644:
881:
772:
417:
1649:
1463:
988:
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807:
191:(which requires a driver to move into the lane used by oncoming traffic) is permitted at a given location.
154:
367:
1370:
1260:
457:
548:
1659:
1478:
334:
1306:
1639:
1365:
1360:
1335:
452:
372:
285:
174:. A road with two lanes of traffic moving in opposite directions would be called a two-lane road.
84:) is the term used for motorways with two or more lanes with no central reservation/median strip.
1713:
134:
130:
1572:
1539:
876:
846:
787:
752:
427:
138:
1534:
1255:
871:
762:
362:
126:
1577:
1275:
998:
896:
782:
382:
8:
1529:
1403:
1122:
1078:
966:
818:
757:
513:
498:
493:
387:
321:
278:
118:
85:
73:
1433:
1247:
1232:
1043:
978:
901:
886:
831:
735:
669:
659:
567:
437:
402:
1493:
1296:
1227:
1177:
916:
797:
635:
607:
592:
577:
447:
442:
432:
77:
48:
for each direction (and, in this case, a two-way pedestrian and cycle way alongside)
1350:
1325:
1112:
1028:
1023:
938:
741:
696:
538:
344:
339:
228:
89:
81:
1587:
1547:
1458:
1448:
1418:
1408:
1393:
1355:
1311:
1137:
1127:
1058:
674:
377:
57:
1557:
1519:
1488:
1468:
1453:
1265:
1147:
689:
617:
488:
483:
422:
412:
304:
161:, but a number of link roads at motorway interchanges are single-carriageway.
1692:
1567:
1524:
1473:
1413:
1378:
1345:
1212:
1162:
1152:
1053:
983:
973:
866:
836:
725:
684:
602:
478:
312:
92:
due to the lack of separation between traffic moving in opposing directions.
41:
1592:
1582:
1483:
1438:
1398:
1388:
1383:
1340:
1222:
1217:
1142:
1068:
1038:
930:
911:
841:
679:
587:
329:
171:
1562:
1207:
1197:
1172:
1097:
1008:
961:
956:
906:
711:
643:
612:
223:
69:
1552:
1428:
1301:
1237:
1202:
1182:
1063:
1033:
1003:
943:
891:
543:
188:
100:
1423:
1270:
1157:
1117:
1107:
1102:
993:
861:
856:
706:
625:
582:
533:
523:
518:
508:
204:
125:
on single-carriageway roads vary depending on their classification:
37:
249:"Single carriageway roads seven times more dangerous than motorways"
1616:
1611:
1443:
1192:
1187:
1048:
1013:
951:
597:
572:
397:
1514:
1498:
1167:
1018:
528:
503:
340:
Dual carriageway / Divided highway / Expressway
270:
133:
have a general speed limit of 100 km/h (60 mph), while
1621:
1291:
701:
664:
158:
88:
is generally worse for high-speed single carriageways than for
32:
198:
301:
65:
61:
45:
1132:
40:
27:
Road with nothing to separate opposing flows of traffic
1690:
286:
214:closely spaced driveways (or minor streets).
293:
279:
199:Undivided highways with central turn lanes
184:Manual on Uniform Traffic Control Devices
76:to separate opposing flows of traffic. A
99:
31:
14:
1691:
1389:Median / Central reservation
274:
195:looking at the striping coloration.
24:
1307:Risk compensation (road transport)
300:
104:Examples of carriageway variations
25:
1725:
179:U.S. Department of Transportation
144:
1704:Roads in the Republic of Ireland
1673:Glossary of road transport terms
164:
74:central reservation/median strip
241:
13:
1:
1655:Pavement performance modeling
1645:International roughness index
234:
1650:Present serviceability index
1444:Sidewalk / Pavement
989:Diamond grinding of pavement
95:
7:
1699:Roads in the United Kingdom
1622:Underpass / Tunnel
1617:Overpass / Flyover
1371:High-occupancy vehicle lane
1261:Driving under the influence
335:Freeway / Motorway
217:
10:
1730:
1709:Roads in the United States
549:Highway systems by country
202:
108:
1668:
1660:Granular base equivalency
1630:
1601:
1507:
1479:Traffic signal preemption
1324:
1284:
1246:
1088:
1077:
929:
887:Right-in/right-out (RIRO)
816:
793:Single-point urban (SPUI)
733:
724:
652:
557:
471:
353:
320:
311:
1640:Pavement condition index
1366:High-occupancy toll lane
1361:Contraflow lane reversal
1336:Barrier transfer machine
131:national secondary roads
494:Express-collector setup
1678:Road types by features
1573:Raised pavement marker
1540:Constant-slope barrier
1464:Traffic directionality
1454:Street running railway
877:Protected intersection
127:national primary roads
105:
68:arranged within a one
64:with one, two or more
49:
1535:Concrete step barrier
872:Offset T-intersection
203:Further information:
117:is used for roads in
103:
35:
1578:Road surface marking
1276:Single-vehicle crash
999:Full depth recycling
897:Seagull intersection
177:In keeping with the
1404:Pedestrian crossing
967:Reinforced concrete
803:Three-level diamond
514:Two-lane expressway
499:Farm-to-market road
86:Road traffic safety
1434:Runaway truck ramp
1256:Driver's education
1044:Rubberized asphalt
979:Crocodile cracking
902:Split intersection
670:Hierarchy of roads
631:Single carriageway
115:single carriageway
106:
54:single carriageway
50:
1686:
1685:
1494:Wide outside lane
1320:
1319:
1297:Automotive safety
1178:Road slipperiness
925:
924:
773:Diverging diamond
720:
719:
636:Single-track road
578:Bicycle boulevard
255:. 24 October 2013
90:dual carriageways
78:single-track road
18:Undivided highway
16:(Redirected from
1721:
1530:Cat's eye (road)
1351:Complete streets
1123:Dead Man's Curve
1086:
1085:
1024:Pavement milling
939:Asphalt concrete
882:Quadrant roadway
823:
745:
731:
730:
697:Street hierarchy
345:Elevated highway
318:
317:
295:
288:
281:
272:
271:
265:
264:
262:
260:
245:
229:Dual carriageway
82:American English
21:
1729:
1728:
1724:
1723:
1722:
1720:
1719:
1718:
1689:
1688:
1687:
1682:
1664:
1632:
1626:
1597:
1588:Traffic barrier
1548:F-Shape barrier
1503:
1459:Traffic calming
1419:Reversible lane
1409:Pedestrian zone
1394:Motorcycle lane
1356:Contraflow lane
1328:time allocation
1327:
1316:
1312:Underride guard
1280:
1242:
1128:Expansion joint
1090:
1080:
1073:
1059:Stamped asphalt
921:
852:Continuous flow
825:
821:
820:
812:
746:
742:grade-separated
739:
738:
716:
675:Private highway
648:
553:
467:
349:
307:
299:
269:
268:
258:
256:
247:
246:
242:
237:
220:
207:
201:
167:
147:
111:
98:
58:British English
28:
23:
22:
15:
12:
11:
5:
1727:
1717:
1716:
1714:Types of roads
1711:
1706:
1701:
1684:
1683:
1681:
1680:
1675:
1669:
1666:
1665:
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1662:
1657:
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1642:
1636:
1634:
1628:
1627:
1625:
1624:
1619:
1614:
1609:
1605:
1603:
1599:
1598:
1596:
1595:
1590:
1585:
1580:
1575:
1570:
1565:
1560:
1558:Jersey barrier
1555:
1550:
1545:
1542:
1537:
1532:
1527:
1522:
1517:
1511:
1509:
1505:
1504:
1502:
1501:
1496:
1491:
1489:Unused highway
1486:
1481:
1476:
1471:
1469:Traffic island
1466:
1461:
1456:
1451:
1446:
1441:
1436:
1431:
1426:
1421:
1416:
1411:
1406:
1401:
1396:
1391:
1386:
1381:
1376:
1373:
1368:
1363:
1358:
1353:
1348:
1343:
1338:
1332:
1330:
1322:
1321:
1318:
1317:
1315:
1314:
1309:
1304:
1299:
1294:
1288:
1286:
1282:
1281:
1279:
1278:
1273:
1268:
1266:Drowsy driving
1263:
1258:
1252:
1250:
1244:
1243:
1241:
1240:
1235:
1230:
1225:
1220:
1215:
1210:
1205:
1200:
1195:
1190:
1185:
1180:
1175:
1170:
1165:
1160:
1155:
1150:
1148:Level crossing
1145:
1140:
1135:
1130:
1125:
1120:
1115:
1110:
1105:
1100:
1094:
1092:
1083:
1075:
1074:
1072:
1071:
1066:
1061:
1056:
1051:
1046:
1041:
1036:
1031:
1026:
1021:
1016:
1011:
1006:
1001:
996:
991:
986:
981:
976:
971:
970:
969:
959:
954:
949:
946:
941:
935:
933:
927:
926:
923:
922:
920:
919:
914:
909:
904:
899:
894:
889:
884:
879:
874:
869:
864:
859:
854:
849:
847:Channelization
844:
839:
834:
832:3-way junction
828:
826:
817:
814:
813:
811:
810:
805:
800:
795:
790:
785:
780:
775:
770:
765:
760:
755:
749:
747:
734:
728:
726:Road junctions
722:
721:
718:
717:
715:
714:
709:
704:
699:
694:
693:
692:
690:business route
687:
677:
672:
667:
662:
656:
654:
650:
649:
647:
646:
641:
638:
633:
628:
623:
620:
618:Primitive road
615:
610:
605:
600:
595:
590:
585:
580:
575:
570:
565:
561:
559:
555:
554:
552:
551:
546:
541:
536:
531:
526:
521:
516:
511:
506:
501:
496:
491:
489:County highway
486:
484:Collector road
481:
475:
473:
469:
468:
466:
465:
460:
458:United Kingdom
455:
450:
445:
440:
435:
430:
425:
420:
415:
410:
405:
400:
395:
393:Czech Republic
390:
385:
380:
375:
370:
365:
359:
357:
351:
350:
348:
347:
342:
337:
332:
326:
324:
322:Limited-access
315:
309:
308:
298:
297:
290:
283:
275:
267:
266:
239:
238:
236:
233:
232:
231:
226:
219:
216:
200:
197:
166:
163:
151:UK speed limit
146:
145:United Kingdom
143:
135:regional roads
110:
107:
97:
94:
26:
9:
6:
4:
3:
2:
1726:
1715:
1712:
1710:
1707:
1705:
1702:
1700:
1697:
1696:
1694:
1679:
1676:
1674:
1671:
1670:
1667:
1661:
1658:
1656:
1653:
1651:
1648:
1646:
1643:
1641:
1638:
1637:
1635:
1629:
1623:
1620:
1618:
1615:
1613:
1610:
1607:
1606:
1604:
1600:
1594:
1591:
1589:
1586:
1584:
1581:
1579:
1576:
1574:
1571:
1569:
1568:Noise barrier
1566:
1564:
1561:
1559:
1556:
1554:
1551:
1549:
1546:
1543:
1541:
1538:
1536:
1533:
1531:
1528:
1526:
1525:Cable barrier
1523:
1521:
1518:
1516:
1513:
1512:
1510:
1506:
1500:
1497:
1495:
1492:
1490:
1487:
1485:
1482:
1480:
1477:
1475:
1474:Traffic lanes
1472:
1470:
1467:
1465:
1462:
1460:
1457:
1455:
1452:
1450:
1447:
1445:
1442:
1440:
1437:
1435:
1432:
1430:
1427:
1425:
1422:
1420:
1417:
1415:
1414:Refuge island
1412:
1410:
1407:
1405:
1402:
1400:
1397:
1395:
1392:
1390:
1387:
1385:
1382:
1380:
1379:Living street
1377:
1374:
1372:
1369:
1367:
1364:
1362:
1359:
1357:
1354:
1352:
1349:
1347:
1346:Climbing lane
1344:
1342:
1339:
1337:
1334:
1333:
1331:
1329:
1323:
1313:
1310:
1308:
1305:
1303:
1300:
1298:
1295:
1293:
1290:
1289:
1287:
1283:
1277:
1274:
1272:
1269:
1267:
1264:
1262:
1259:
1257:
1254:
1253:
1251:
1249:
1248:Human factors
1245:
1239:
1236:
1234:
1231:
1229:
1226:
1224:
1221:
1219:
1216:
1214:
1213:Traffic light
1211:
1209:
1206:
1204:
1201:
1199:
1196:
1194:
1191:
1189:
1186:
1184:
1181:
1179:
1176:
1174:
1171:
1169:
1166:
1164:
1163:Oversize load
1161:
1159:
1156:
1154:
1153:Manhole cover
1151:
1149:
1146:
1144:
1141:
1139:
1136:
1134:
1131:
1129:
1126:
1124:
1121:
1119:
1116:
1114:
1111:
1109:
1106:
1104:
1101:
1099:
1096:
1095:
1093:
1087:
1084:
1082:
1076:
1070:
1067:
1065:
1062:
1060:
1057:
1055:
1052:
1050:
1047:
1045:
1042:
1040:
1037:
1035:
1032:
1030:
1027:
1025:
1022:
1020:
1017:
1015:
1012:
1010:
1007:
1005:
1002:
1000:
997:
995:
992:
990:
987:
985:
984:Crushed stone
982:
980:
977:
975:
972:
968:
965:
964:
963:
960:
958:
955:
953:
950:
947:
945:
942:
940:
937:
936:
934:
932:
928:
918:
915:
913:
910:
908:
905:
903:
900:
898:
895:
893:
890:
888:
885:
883:
880:
878:
875:
873:
870:
868:
867:Michigan left
865:
863:
860:
858:
855:
853:
850:
848:
845:
843:
840:
838:
835:
833:
830:
829:
827:
824:
819:Intersections
815:
809:
806:
804:
801:
799:
796:
794:
791:
789:
786:
784:
781:
779:
776:
774:
771:
769:
768:Directional T
766:
764:
761:
759:
756:
754:
751:
750:
748:
743:
737:
732:
729:
727:
723:
713:
710:
708:
705:
703:
700:
698:
695:
691:
688:
686:
685:special route
683:
682:
681:
678:
676:
673:
671:
668:
666:
663:
661:
658:
657:
655:
651:
645:
642:
639:
637:
634:
632:
629:
627:
624:
621:
619:
616:
614:
611:
609:
606:
604:
603:Frontage road
601:
599:
596:
594:
591:
589:
586:
584:
581:
579:
576:
574:
571:
569:
566:
563:
562:
560:
556:
550:
547:
545:
542:
540:
537:
535:
532:
530:
527:
525:
522:
520:
517:
515:
512:
510:
507:
505:
502:
500:
497:
495:
492:
490:
487:
485:
482:
480:
479:Arterial road
477:
476:
474:
470:
464:
463:United States
461:
459:
456:
454:
451:
449:
446:
444:
441:
439:
436:
434:
431:
429:
426:
424:
421:
419:
416:
414:
411:
409:
406:
404:
401:
399:
396:
394:
391:
389:
386:
384:
381:
379:
376:
374:
371:
369:
366:
364:
361:
360:
358:
356:
352:
346:
343:
341:
338:
336:
333:
331:
328:
327:
325:
323:
319:
316:
314:
313:Types of road
310:
306:
303:
296:
291:
289:
284:
282:
277:
276:
273:
254:
253:The Telegraph
250:
244:
240:
230:
227:
225:
222:
221:
215:
211:
206:
196:
192:
190:
186:
185:
180:
175:
173:
165:United States
162:
160:
156:
152:
142:
140:
136:
132:
128:
124:
120:
116:
102:
93:
91:
87:
83:
79:
75:
71:
67:
63:
59:
55:
47:
43:
42:arterial road
39:
34:
30:
19:
1593:Traffic cone
1583:Rumble strip
1484:Truck bypass
1439:Shared space
1399:Passing lane
1384:Managed lane
1341:Bicycle lane
1223:Washboarding
1218:Traffic sign
1143:Hairpin turn
912:Texas U-turn
842:Box junction
736:Interchanges
680:Route number
630:
588:Country lane
330:Bike freeway
257:. Retrieved
252:
243:
212:
208:
193:
182:
176:
172:traffic flow
168:
149:The maximum
148:
123:Speed limits
114:
112:
53:
51:
46:traffic lane
29:
1631:Performance
1563:Kassel kerb
1520:Botts' dots
1508:Demarcation
1208:Storm drain
1173:Road debris
1098:Aquaplaning
1091:environment
1079:Road safety
957:Cobblestone
907:Superstreet
712:Winter road
660:Concurrency
653:Other terms
644:Sunken lane
613:Main street
558:Local roads
224:Carriageway
139:local roads
70:carriageway
1693:Categories
1633:indicators
1602:Structures
1553:Guard rail
1429:Road verge
1302:Seat belts
1238:Snowsquall
1203:Speed bump
1183:Road train
1004:Glassphalt
944:Bioasphalt
917:Turnaround
892:Roundabout
822:(at-grade)
788:Roundabout
753:Cloverleaf
608:Green lane
544:Trunk road
472:Main roads
355:By country
235:References
1424:Road diet
1326:Space and
1271:Road rage
1158:Oil spill
1118:Crosswind
1108:Black ice
1103:Avalanche
1029:Permeable
862:Jughandle
857:Hook turn
763:Free-flow
707:Toll road
626:Side road
583:Boulevard
539:Super two
534:Ring road
509:Link road
408:Hong Kong
363:Australia
305:hierarchy
205:Road diet
113:The term
96:Countries
44:with one
1612:Causeway
1449:Shoulder
1285:Vehicles
1233:Whiteout
1193:Rockfall
1188:Roadkill
1113:Bleeding
1089:Road and
1049:Sealcoat
974:Corduroy
962:Concrete
952:Chipseal
931:Surfaces
783:Raindrop
598:Driveway
593:Dead end
573:Backroad
524:2+2 road
519:2+1 road
443:Portugal
433:Pakistan
218:See also
155:built-up
72:with no
1515:Bollard
1499:Woonerf
1228:Washout
1168:Pothole
1081:factors
1069:Texture
1039:Plastic
1019:Macadam
808:Trumpet
758:Diamond
529:Parkway
504:Highway
418:Ireland
398:Germany
388:Croatia
368:Belgium
259:15 July
189:passing
119:Ireland
109:Ireland
60:) is a
1608:Bridge
1292:Airbag
1064:Tarmac
1009:Gravel
837:Bowtie
778:Parclo
702:Stroad
665:Detour
640:Street
568:Avenue
453:Taiwan
438:Poland
403:Greece
378:Canada
373:Brazil
159:A38(M)
1034:Plank
948:Brick
798:Stack
564:Alley
448:Spain
428:Nepal
423:Italy
413:India
383:China
66:lanes
1544:Curb
1375:Lane
1138:Ford
1054:Sett
994:Dirt
622:Road
302:Road
261:2024
137:and
129:and
62:road
38:A511
36:The
1198:Rut
1133:Fog
1014:Ice
181:'s
121:.
1695::
251:.
52:A
744:)
740:(
294:e
287:t
280:v
263:.
56:(
20:)
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