Wikipedia:WikiProject U.S. Roads/Delaware/Maintenance road numbers

Every road with one of these numbers (listed in the traffic counts) is presumably state-maintained, with some also having signed numbers. Low numbers (and all signed routes) are listed here, as they are presumably the main or old main roads.

Kent County

K1 US 13; Smyrna-Leipsic Road to New Castle
K2 US 13; old US 113 to Smyrna-Leipsic Road
K3 US 13A; US 13 Camden to US 13 Pleasanton Acres
K4 US 13A; US 13 Canterbury to US 13 Camden
K5 US 13; DE 14 to Canterbury
K6 US 13; Sussex to DE 14
K7 old US 113; DE 10 to US 13
K8 US 113, DE 1; Sussex to DE 10
- K8A DE 1; Sussex to US 113 south
K9 DE 9, US 13 south to Woodland Beach
K10 DE 12; Front/Frederica to DE 1
K11 DE 9; Smyrna-Leipsic Road to DE 6
K12 DE 9; DE 42 to Smyrna-Leipsic Road
K14 DE 42; US 13 to DE 9
K15 DE 9; DE 8 to DE 42
K16 DE 8, DE 9; Kings Highway to Little Creek
K17 DE 9; DE 1 to Little Creek
K20 DE 1B; Rehoboth/Walnut to US 113 south
K21 DE 1B; Sussex to Rehoboth/Walnut
K22 DE 14; US 113 to DE 1B
K24 US 13; Canterbury to old US 113
K26 DE 10A; Rising Sun Road to old US 113A south
K27 old US 113A (including DE 10A); US 113 Little Heaven to US 13
K29 DE 10; Willow Grove/Camden-Wyoming to Rising Sun Road
K30 DE 10A; US 13A to Rising Sun Road
K33 DE 15; DE 12 to US 13
K34 DE 12; US 13 to Front/Frederica
K36 DE 14; US 13 to US 113
K38 DE 15; Clayton to New Castle
K39 DE 6; Maryland to DE 300 west
K41 DE 300; Maryland to DE 6 west
K42 DE 15; DE 42 west to Brenford/Mt. Friendship
K44 DE 42; DE 6 to DE 300
K45 DE 42: DE 300 to US 13
K46 DE 11; DE 44 to DE 300
K47 DE 11; Maryland to DE 44
K48 DE 44; DE 300 to DE 11
K49 DE 44; DE 11 to DE 8
K50 DE 8; Maryland to DE 44
K51 DE 8; DE 44 to Kings Highway
K52 DE 15; Moose Lodge/Westville to South/Railroad
K53 DE 10; Maryland to Willow Grove/Camden-Wyoming
K54 DE 10A; DE 10 to US 13A
K57 DE 12; Maryland to US 13
K60 DE 14; Maryland to US 13
K63 DE 16; Maryland to Sussex
K73 DE 15; Hazlettville Road to North/Saulsbury
K91 DE 15; Brenford/Mt. Friendship to DE 300 west
K100 DE 15; McKee/Dennys to Dennys/Kenton
K104 DE 15; Dennys/Kenton to DE 42 east
K125 DE 15; DE 10A west to Moose Lodge/Westville
K138 DE 15; DE 300 east to DE 6 west
K150 DE 1; DE 10 to New Castle
- K150A Puncheon Run Connector; US 13 to DE 1
K156 DE 15; North/Saulsbury to McKee/Dennys
K195 DE 15; South/Railroad to Hazlettville Road
K314 DE 14 Truck: DE 14 to Farmington/Tower Hill
K315 DE 14 Truck: Farmington/Tower Hill to US 13
K320 DE 9; DE 6 to New Castle
K356 DE 10; Rising Sun Road to DE 1
K388 DE 15; DE 14 to DE 12
K409 DE 14; DE 1B to DE 1
K453 DE 15; DE 6 east to somewhere in Clayton
K454 DE 300; DE 6 west to US 13

New Castle County

N1 US 13; Kent to DE 299
N2 DE 9; Port Penn Road to Clinton Street
N3 DE 273; Chapman Road to US 13
N4 DE 202, US 202; US 13B to Pennsylvania
N5 DE 7; DE 72 to DE 273 east
N6 DE 9, DE 141; 7th/Washington to DE 2
N9 DE 52; Pennsylvania to west of I-495
N10 DE 15; Dogtown/Levels to US 301 south
N11 DE 2; Maryland to DE 52
N13 DE 72; Possum Park/Papermill to DE 7
N14 DE 71; US 13 to DE 299
N15 DE 896; US 13 to US 301 south
N16 US 301; DE 896 south to DE 71 north
N17 DE 92; US 202 to US 13
N18 DE 273; DE 2 east to Chapman Road
N19 DE 9; Wilmington Road to US 13 south
N21 DE 62, DE 41; DE 141 to DE 48
N22 US 13; DE 299 to Port Penn Road
N23 DE 3; Washington/Marsh to DE 92
N24 US 13B, US 13; Front Street to Pennsylvania
N26 DE 7; DE 273 west to Baltimore/Mall
N27 DE 100; DE 4 to DE 48 east
N28 US 13; I-495 to Christiana Avenue
N29 US 13B; I-495 to Front Street
N31 DE 7; DE 4 east to Pennsylvania
N32 US 40; Maryland to US 40
N33 US 13; US 40 west to I-495
N34 US 13; Port Penn Road to DE 72 east
N35 DE 71; US 301 north to US 13
N36 DE 15; Dexter Corner to Dexter Corner/Blackbird Station
N39 DE 71, US 301; DE 299 to DE 896 south
N40 DE 15; Kent to Clayton Delaney Road
N41 DE 273; Maryland to DE 2 west
N42 DE 15; Caldwell Corner Road to Dogtown/Levels
N43 DE 3 (Washington Street); US 13B north to Washington/Marsh
N46 DE 72; DE 9 to DE 7
N47 DE 15; Greenspring to Dexter Corner
N50 US 13; Christiana Avenue to US 13B south
N55 DE 273, DE 9; US 13 to Ferry/6th
N56 I-95, I-295; Maryland to New Jersey
N59 I-95; I-295 to Pennsylvania
N60 I-495; I-95 to I-95
N62 US 301; Maryland to DE 299 west
N67 DE 1, DE 7; US 13 north to DE 4 west
N80 DE 1; Kent to south of Odessa
N82 DE 1, US 13; south of canal to US 40 west
N83 DE 1; south of Odessa to south of canal
N203 DE 261; US 202 to Pennsylvania
N220 DE 3; I-495 to US 13B north
N221 DE 92; Thompson Bridge/Beavervalley to US 202
N225 DE 100, DE 92; DE 141 north to Thompson Bridge/Beavervalley
N232 DE 100; DE 92 to Pennsylvania
N237 DE 41, DE 48; Pennsylvania to US 13B
N242 DE 82; New London/Campbell to DE 52
N247 DE 82; Pennsylvania to Snuffmill/Mt. Cuba
N261 DE 82; Snuffmill/Mt. Cuba to Mt. Cuba/Creek
N262 DE 82; Mt. Cuba/Creek to New London/Campbell
N267 DE 141; DE 52 to US 202
N270 DE 34; Duncan Road to DE 100
N271 DE 141; DE 2 to DE 52
N309 DE 896 south; Cleveland Avenue
N313 DE 896; DE 2 east to Maryland
N314 DE 72; DE 2 east to Possum Park/Papermill
N334 DE 62; DE 141 to Meco Circle
N336 DE 4; DE 7 south to DE 48
- N336A DE 7; Baltimore/Mall to DE 1 south
N339 DE 58; DE 273 to DE 4
N340 DE 37; DE 273 to Airport/Commons
N341 DE 37; Airport/Commons to DE 141
N356 DE 72; DE 7 to DE 2 west
N358 DE 4; Ogletown to DE 7 south
N359 DE 9A; DE 9 to Christiana Avenue
N366 DE 4; DE 2 to Ogletown
N378 DE 9, 7th, 6th, DE 9; DE 72 to Wilmington Road
N381 DE 9 Truck; US 13 to DE 9
N387 DE 896, College Avenue; DE 71 to DE 2
N410 DE 9; Clinton Street to DE 72
N422 DE 9; Belts Road to Port Penn Road
N423 DE 9; Bayview Road to Belts Road
N424 DE 9; Old Corbit Road to Bayview Road
N433 DE 286, DE 15; Maryland to US 301
N435 DE 15; Bunker Hill/Choptank to DE 286
N437 DE 15; US 301 north to Bunker Hill/Choptank
N438 DE 299; US 301 north to US 13
N439 DE 9; Thomas Landing Road to Old Corbit Road
N440 DE 9; DE 299 to Thomas Landing Road
N441 DE 299; US 13 to Old State/Taylors Bridge
N443 DE 299, US 301; Maryland to DE 71 south
N449 DE 9, DE 299; Kent to Old State/Taylors Bridge
N463 DE 15; Dexter Corner/Blackbird Station to Caldwell Corner Road
N482 DE 15; Clayton Delaney Road to Greenspring
N497 DE 9; US 13 north to DE 2

Sussex County

S1 US 13; Maryland to DE 24
S2 US 13; DE 24 to DE 20 east
S3 US 13; DE 20 east to DE 18
S4 US 13; DE 18 to Kent
S5 US 13B; US 13 to US 13 Bridgeville
S6 DE 404; US 13 south to DE 18 west
S7 DE 1; DE 1B north to Kent
S13 old US 13A; DE 54 to US 13
S14 DE 1, DE 1B; DE 1A north to Kent
S15 DE 1A; 2nd/Rehoboth to DE 1
S16 DE 16; Kent to Broadkill Beach
S17 DE 404B; Seashore/Market to US 13B north
S18 DE 18, US 9, US 9B; Maryland to Savanna/Cape Henlopen
S19 US 9B, US 9; Savanna/Cape Henlopen to ferry
S20 DE 20; US 13 south to US 113 north
S21 DE 20; Maryland to US 13 north
S22 DE 23, DE 5; Masseys Landing to DE 1
S23 US 9; Kings Highway to US 9B
S24 DE 24; Maryland to DE 1
S25 DE 30; DE 26 east to DE 24 west
S26 DE 26; Maryland to beach
S28 US 9; US 13 to DE 18
S32 DE 36; DE 404 to DE 16 west
S36 DE 36; DE 16 east to Cedar Creek
S48 DE 24A; Zoar/Speedway to DE 23
S50 DE 1, DE 1A; Maryland to 2nd/Rehoboth
S52 DE 17; DE 54 to DE 26
S58 DE 54; Main/Church to DE 1
S60 DE 54; DE 26 east to Cypress/Cemetery
S64 DE 30; old US 13 to DE 26 west
S76 DE 54; Columbia Road to US 13
S84 DE 54A; Bayard/Daisey to Bayard/Double Bridges
S113 US 113; Maryland to Kent
S206 DE 30; Cedar Creek/Wilkens to DE 1
S212 DE 30; Isaacs/Cedar Creek to Cedar Creek/Wilkens
S230 DE 30; DE 16 to Isaacs/Cedar Creek
S248 DE 30; DE 24 east to DE 16
S268 US 9; DE 1 to Kings Highway
S272 DE 1B; DE 1 to DE 1A
S275 DE 1D/DE 24A; DE 23 to DE 24
S285 DE 23; DE 5 north to US 9 west
S297 DE 5; River Road to DE 24 west
S318 US 9 Truck; Bedford/Park to US 9
S319 DE 5A; DE 30 to DE 5
S325 DE 24A; US 113 to Zoar/Speedway
S334 DE 20; US 113 south to DE 26 west
S376 DE 54; Cemetery/Main to Main/Church
S377 DE 54; Cypress/Cemetery to Cemetery/Main
S382 DE 20; DE 26 east to DE 54 west
S319 DE 54; US 13 to DE 26 west
S361 DE 54A; Double Bridges/Muddy Neck to DE 26
S363 DE 54A; Bayard/Double Bridges to Double Bridges/Muddy Neck
S384 DE 54A; DE 20 to Bayard/Daisey
S389 DE 54A; DE 54 to DE 20
S404 DE 404, DE 404B; Maryland to Seashore/Market
S431 US 9 Truck; US 113 to Bedford/Park
S513 DE 54; Maryland to Columbia Road
S582 DE 404; DE 404B east to US 13 north