DfI Roads

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DfI Roads (formerly Transport NI and, before that, the Roads Service of Northern Ireland) is the sole Road Authority in Northern Ireland, responsible for all public roads, as well as footways, bridges, and street lights. It is part of the Department for Infrastructure (DfI), which was previously known as the Department for Regional Development (DRD).

In the remainder of the UK, trunk roads are the responsibility of national entities, such as Highways England, whilst other roads are looked after by local authorities. In Northern Ireland, however, all public roads are the responsibility of the Department for Infrastructure.

Headquarters

Clarence Court 10 - 18 Adelaide Street Belfast BT2 8GB

Classified unnumbered (Class III) roads

Main Article: Northern Ireland (Class III roads)

For its Class III road network, Northern Ireland uses "C" prefixes.

External links



DfI Roads
CrossingsStrangford - Portaferry ferry
RoadsA101 (Northern Ireland) • A11 (Northern Ireland) • A12 (Northern Ireland) • A1 (Northern Ireland) • A20 (Northern Ireland) • A211 (Northern Ireland) • A21 (Northern Ireland) • A22 (Northern Ireland) • A23 (Northern Ireland) • A24 (Northern Ireland) • A25 (Northern Ireland) • A26 (Northern Ireland) • A27 (Northern Ireland) • A28 (Northern Ireland) • A29 (Northern Ireland) • A2 (Northern Ireland) • A30 (Northern Ireland) • A31 (Northern Ireland) • A32 (Northern Ireland) • A34 (Northern Ireland) • A35 (Northern Ireland) • A36 (Northern Ireland) • A371 (Northern Ireland) • A37 (Coleraine - Limavady) • A37 (Cullaville) • A38 (Northern Ireland) • A3 (Northern Ireland) • A40 (Northern Ireland) • A42 (Northern Ireland) • A43 (Northern Ireland) • A44 (Northern Ireland) • A45 (Northern Ireland) • A46 (Northern Ireland) • A47 (Northern Ireland) • A48 (Northern Ireland) • A49 (Northern Ireland) • A4 (Northern Ireland) • A501 (Northern Ireland) • A505 (Northern Ireland) • A509 (Northern Ireland) • A50 (Northern Ireland) • A510 (Northern Ireland) • A512 (Northern Ireland) • A513 (Northern Ireland) • A514 (Northern Ireland) • A515 (Northern Ireland) • A519 (Northern Ireland) • A51 (Northern Ireland) • A520 (Northern Ireland) • A522 (Northern Ireland) • A523 (Northern Ireland) • A52 (Northern Ireland) • A54 (Northern Ireland) • A55 (Northern Ireland) • A57 (Northern Ireland) • A5 (Northern Ireland) • A6 (Northern Ireland) • A76 (Northern Ireland) • A7 (Northern Ireland) • A8(M) (Northern Ireland) • A8 (Northern Ireland) • A99 (Northern Ireland) • B100 (Northern Ireland) • B102 (Northern Ireland) • B103 (Northern Ireland) • B104 (Northern Ireland) • B105 (Northern Ireland) • B106 (Northern Ireland) • B108 (Northern Ireland) • B114 (Northern Ireland) • B115 (Northern Ireland) • B118 (Northern Ireland) • B119 (Northern Ireland) • B126 (Northern Ireland) • B127 (Northern Ireland) • B12 (Crumlin - Lurgan) • B135 (Northern Ireland) • B140 (Northern Ireland) • B143 (Northern Ireland) • B145 (Northern Ireland) • B146 (Northern Ireland) • B147 (Northern Ireland) • B148 (Northern Ireland) • B149 (Northern Ireland) • B14 (Northern Ireland) • B150 (Northern Ireland) • B154 (Northern Ireland) • B156 (Northern Ireland) • B158 (Northern Ireland) • B15 (Northern Ireland) • B161 (Northern Ireland) • B162 (Northern Ireland) • B164 (Northern Ireland) • B165 (Northern Ireland) • B168 (Northern Ireland) • B16 (Northern Ireland) • B170 (Northern Ireland) • B172 (Northern Ireland) • B173 (Northern Ireland) • B175 (Northern Ireland) • B176 (Northern Ireland) • B177 (Northern Ireland) • B178 (Northern Ireland) • B17 (Northern Ireland) • B180 (Northern Ireland) • B181 (Northern Ireland) • B182 (Northern Ireland) • B185 (Northern Ireland) • B186 (Northern Ireland) • B188 (Northern Ireland) • B18 (Northern Ireland) • B190 (Northern Ireland) • B192 (Northern Ireland) • B193 (Northern Ireland) • B196 (Northern Ireland) • B197 (Northern Ireland) • B198 (Northern Ireland) • B1 (Northern Ireland) • B201 (Northern Ireland) • B202 (Northern Ireland) • B205 (Northern Ireland) • B207 (Northern Ireland) • B20 (Northern Ireland) • B210 (Northern Ireland) • B21 (Northern Ireland) • B23 (Northern Ireland) • B25 (Northern Ireland) • B27 (Northern Ireland) • B28 (Northern Ireland) • B2 (Northern Ireland) • B30 (Northern Ireland) • B31 (Northern Ireland) • B32 (Northern Ireland) • B34 (Northern Ireland) • B35 (Northern Ireland) • B36 (Northern Ireland) • B38 (Northern Ireland) • B39 (Northern Ireland) • B3 (Northern Ireland) • B40 (Northern Ireland) • B41 (Northern Ireland) • B42 (Northern Ireland) • B43 (Northern Ireland) • B44 (Northern Ireland) • B45 (Northern Ireland) • B46 (Northern Ireland) • B47 (Northern Ireland) • B48 (Northern Ireland) • B49 (Northern Ireland) • B501 (Northern Ireland) • B502 (Northern Ireland) • B503 (Northern Ireland) • B506 (Northern Ireland) • B507 (Northern Ireland) • B50 (Northern Ireland) • B511 (Northern Ireland) • B513 (Northern Ireland) • B514 (Northern Ireland) • B515 (Northern Ireland) • B517 (Northern Ireland) • B518 (Northern Ireland) • B520 (Northern Ireland) • B522 (Northern Ireland) • B523 (Northern Ireland) • B524 (Northern Ireland) • B525 (Northern Ireland) • B527 (Northern Ireland) • B528 (Northern Ireland) • B529 (Northern Ireland) • B52 (Belleek - Florencecourt) • B52 (Portglenone - Randalstown) • B530 (Northern Ireland) • B532 (Northern Ireland) • B533 (Northern Ireland) • B534 (Northern Ireland) • B535 (Northern Ireland) • B536 (Northern Ireland) • B53 (Garrison - Rossinver) • B53 (Moorfields - Randalstown) • B56 (Northern Ireland) • B58 (Northern Ireland) • B59 (Northern Ireland) • B5 (Northern Ireland) • B62 (Northern Ireland) • B66 (Northern Ireland) • B67 (Northern Ireland) • B68 (Northern Ireland) • B69 (Northern Ireland) • B6 (Northern Ireland) • B70 (Northern Ireland) • B73 (Northern Ireland) • B74 (Northern Ireland) • B75 (Northern Ireland) • B76 (Northern Ireland) • B77 (Northern Ireland) • B7 (Northern Ireland) • B80 (Northern Ireland) • B81 (Northern Ireland) • B83 (Northern Ireland) • B84 (Northern Ireland) • B85 (Northern Ireland) • B86 (Northern Ireland) • B8 (Northern Ireland) • B90 (Northern Ireland) • B92 (Northern Ireland) • B93 (Northern Ireland) • B94 (Northern Ireland) • B95 (Northern Ireland) • B96 (Northern Ireland) • B97 (Northern Ireland) • B98 (Northern Ireland) • B99 (Northern Ireland) • B9 (Northern Ireland) • E01 • E16 • E18 • M12 (Northern Ireland) • M1 (Northern Ireland) • M22 (Northern Ireland) • M2 (Northern Ireland) • M3 (Northern Ireland) • M5 (Northern Ireland) • T10 (Northern Ireland) • T11 (Northern Ireland) • T12 (Northern Ireland) • T13 (Northern Ireland) • T14 (Northern Ireland) • T15 (Northern Ireland) • T16 (Northern Ireland) • T17 (Northern Ireland) • T18 (Northern Ireland) • T19 (Northern Ireland) • T1 (Northern Ireland) • T20 (Northern Ireland) • T21 (Northern Ireland) • T22 (Northern Ireland) • T23 (Northern Ireland) • T2 (Northern Ireland) • T3 (Northern Ireland) • T4 (Northern Ireland) • T5 (Northern Ireland) • T6 (Northern Ireland) • T7 (Northern Ireland) • T8 (Northern Ireland) • T9 (Northern Ireland) • Wild Atlantic Way
PlacesMagherafelt
MiscellaneousDfI Roads (Crossings) • DfI Roads (Junctions)
Road Basics
Physical layoutSingle track • Single carriageway • Dual carriageway • High Quality Dual Carriageway • Road Widths • Urban Streets • Abandoned Road
Legal typesAll-purpose Road • Special Road • Motorway • Trunk road • Principal road • Classified Numbered road • Classified Unnumbered Road • Unclassified road • Primary Route • Non Primary Route • Right of Way • Unadopted road
Road numbers1922 Road Lists • Classification • Defunct road • Euroroutes • MoT Maps • National Cycle Network • Numbering principles • Numbering anomalies • Disputed Numbers • Recycled number • Unallocated numbers • Fictional Road Numbers • Junction numbers
Road FeaturesAutomatic Bollard • Balancing Pond • Arterial Road • Bott's Dots • Bypass • Cannon • Cats' Eyes • Cattle Grid • CD Lanes • Central Reservation • Chopsticks • Crash Barrier • Cuttings and Embankments • Cycle Lane • Emergency Phone • Escape lane • Expressway • Fingerpost • Flare • Ford • Gore • Green Bridge • Green Wave • Hairpin bend • Hard shoulder • Island • Junction • Layby • Level Crossing • Local Access Road • Managed Motorways • Milestone • Multiplex • No-Car Lane • Oxbow Road • Parapet • Petrol station • Raised Pavement Markers • Ramp Metering • Retaining Wall • Road Studs • Roadside Art • Roadside Quarry • Roadworks • Secret motorway • Signage • Smart Motorway • Snow pole • Speed Limit • Spur • Street Lighting • Surface Dressing • Temporary terminus • Throughpass • Tidal Flow • Tiger tail • Toll booth • Traffic cone • Traffic Signals • Tunnel • Weaving • Wig-Wag Signals
Traffic CalmingBuild-Outs • Chicane • Dragon's Teeth • Pinch Point • Quiet Lane • Rumble strips • Safety Cameras • Sleeping Policeman • Speed bump
Public Transport FeaturesBus Lane • Bus stop • Guided Busway • Park and Ride • Tramway • Trolleybus System
Other termsAnderson report • Guildford Rules • Highway Authority • Highway Code • Motorway alphabet • Pre-Worboys • Primary Destinations • Roads by 10 • Transport alphabet • Worboys report
AcronymsAADT • ADS • ANPR • ATM • DfT • GSJ • HA • HATO • HE • HETO • HQDC • LAR • LILO • MOVA • NCN • NMU • NRA • PBU • PTS • PFI • RCS • SABRE • SCOOT • SON • SOX • SRN • TEN-T • TERN • TfL • TII • TOTSO • TRO • TSM • TSRGD • UTC • VAS • VMS • VSL
Roads policy and legislation
Legislation (UK)Road Traffic Act 1930 • Trunk Roads Act 1936 • Trunk Roads Act 1946 • Special Roads Act 1949 • Highways Act 1980 • Roads (Scotland) Act 1984 • Road  Traffic Regulation Act 1984 • Transport (Scotland) Act 2005 • Infrastructure Act 2015
Legislation (Ireland)Roads Act 1920 • Local Government (Roads and Drainage) Act 1968 • Local Government (Roads and Motorways) Act 1974 • Local Government (Toll Roads) Act 1979 • Roads Act 1993 • Roads (Amendment) Act 1998 • Roads Act 2007 • Local Government (Roads Functions) Act 2007 • Roads Act 2015
PolicyRoads for the Future (1969) • Roads For Prosperity (1989) • A New Deal for Trunk Roads in England (1998) • Road Investment Strategy (2014)
Governmental bodiesDepartment for Infrastructure (Roads) • Department for Transport • Highways England • North and Mid Wales Trunk Road Agent • Office of Rail and Road • South Wales Trunk Road Agent • Transport Focus • Transport Infrastructure Ireland • Transport Scotland
Other termsProtected Road • Section 278 Agreement • Special Road