B roads are numbered routes in Great Britain of lesser importance than A roads. See the article Great Britain road numbering scheme for the rationale behind the numbers allocated.
| Road | From | To | Notes |
|---|---|---|---|
| B800 | Newbridge | Ferry Muir Rd. Queensferry | |
| B801 | A838 at Richonich | Kinlochbervie | |
| B802 | Kilsyth | B803 at Glenmavis | |
| B803 | A73 near Glenmavis | Coatbridge | |
| B804 | Coatbridge | Gartcosh | |
| B805 | A9 at Laurieston | Bowhouse Roundabout | |
| B806 | B765 at Garthamlock | Gartcosh | |
| B807 (defunct) | A802 Duke Street, Glasgow | A80 (later A8) Alexandra Parade, Glasgow | Now part of the B763. |
| B808 | Partick | near Springburn | |
| B809 (defunct) | Trongate, Glasgow | Buchanan Street, Glasgow | Declassified. |
| B810 | B805 at Brightons | Shieldhill, Falkirk | |
| B811 (defunct) | Great Western Road, Glasgow | Garscube Road, Glasgow | Declassified sometime after 1974. |
| B812 | Springburn | near Lenzie | |
| B813 (defunct) | Partick | Anniesland | The northern portion became a portion of the A739 in the 1960s when the Clyde Tunnel opened while the southern portion was declassified around 1974 when the A814 was rerouted. |
| B814 | Dalmuir | Kilbowie Roundabout | |
| B815 | M898, A898 and A898 at Erskine | A8 at Bishopton, Renfrewshire | |
| B816 | Bonnybridge | Glenfuir Rd. Falkirk | |
| B817 | B9176 near Alness | Kildary | |
| B818 | Denny | B834 near Killearn | |
| B819 | Cadder | Chryston | |
| B820 (defunct) | Loop off A803 in Kirkintilloch | Declassified sometime after the early 1970s. | |
| B821 | A81 at Blanefield | Carbeth | Part of the B821 from Strathblane to Auchinreoch has become the A891 |
| B822 | Lennoxtown | B8032 and A81 | |
| B823 | A9 Stirling | A9 Bridge of Allan | |
| B824 | A820 near Doune | Keir Roundabout | |
| B825 | A803 at Linlithgow Bridge | A9 Caldercruix | |
| B826 | A84 near Doune | A873 at Thornhill, Perthshire | |
| B827 | A822 near Braco | A85 at Dalginross | |
| B828 | A83 at Rest and Be Thankful Viewpoint | B839 | Acts as a diversion when A83 closed avoiding 59 mile diversion. Known as Old Military Road. Unclassified until 1932. |
| B829 | Aberfoyle | near Stronachlachar | |
| B830 | Dumbarton | Barloan Toll Roundabout | |
| B831 (defunct) | A82 south of the Arden Roundabout | B832 in Crosskeys | Upgraded to a portion of the A818 in 2005. |
| B832 | A82 | A818 | |
| B833 | B872 at Garelochhead (east) | at Coulport (west). | The B833 is the main road on the Rosneath Peninsula. |
| B834 | A809 | Killearn | |
| B835 | A81 | A811 Buchlyvie | |
| B836 | A815 at Dalinlongart | A886 at Auchenbreck | Passes through Glen Lean, past Loch Tarsan, round the head of Loch Striven at Ardtaraig. On the Cowal Peninsula, Argyll and Bute. |
| B837 | Drymen | Balmaha | |
| B838 | A83 at Arrochar | Arrochar | |
| B839 | A815 | Lochgoilhead | Passes through Hells Glen. Forms part of A83 diversion together with B828 avoiding 59 mile diversion. |
| B840 | A816 near Carnasserie Castle | A819 at Cladich | Follows southern bank of Loch Awe for most of its length |
| B841 | A816 | Bellanoch | Ends near Bellanoch Swing Bridge. |
| B842 | Claonaig | Southend (Scotland) | Road stops and continues at Campbelltown. |
| B843 | near Campbelltown | Machrihanish | Connects with B842 |
| B844 | Clachan Bridge | Kilninver | |
| B845 | A828 at Barcaldine | Loch Awe south of Kilchrenan | Crosses Loch Etive south of Bonawe Crosses the A85 at Taynuilt |
| B846 | Aberfeldy | Rannoch railway station | |
| B847 | B846 Balmore | near Falls of Bruar | |
| B849 | A884 at Lochaline | Drimnin | |
| B850 (defunct) | B849 at Carnoch | Acharacle Pier | Section east of Salen became a portion of the A861 around 1923–1924. Around this time (and definitely by 1932) the B850 was extended around Loch Shiel and Loch Moidart to a pier on the northern shore of the loch. The remainder also became a portion of the A861 in 1967 after the new road was built between the A830 and B850. |
| B851 | A9 south of Daviot | B862 northeast of Errogie | Passes through Farr and East Croachy |
| B852 | Dores Beach B862 | B862 | |
| B853 | B9006 at Inverness | Southside Road, Inverness | |
| B854 (defunct) | Milton | Balchraggan | Renumbered as A833, likely by 1939. A 1938 map shows the route as B854, while a 1939 and 1944 map show both numbers. A 1946 map shows the route as A833. |
| Drumkinnon, Balloch | Haldane's Mill | Number not allocated until 1938–1939; declassified sometime after the mid-1970s. | |
| B855 | A836 at Dunnet | Easter Head (Dunnet Head) | The most northerly numbered road on the mainland of Great Britain Passes through Hunspow and Brough |
| B856 | Strathcarron Junction | Strathcarron railway station | Now part of the A890. |
| B857 | A811 Alexandria | A82 | |
| B858 | South of Drymen | North of Drymen | |
| B859 (defunct) | Braemore Junction | Poolewe | Became a portion of the A832 by 1932 (probably earlier). |
| High Street, Dingwall | Station Road, Dingwall | One portion now part of the A862, the remainder unclassified. | |
| B860 (defunct) | Ullapool | Ledmore | Renumbered to A835 by 1932. |
| Paisley Road, Glasgow | Shieldhall | Former portion of A8; declassified when the M8 opened. | |
| B861 | B851 at Inverarnie | Inverness | |
| B862 | Fort Augustus | Inverness | |
| B863 | North Ballachulish | Glencoe | |
| B864 | A839 near Lairg | A837 at Inveran | |
| B865 | Raigmore Interchange | Shore Street Roundabout | |
| B866 | A886 | A886 | |
| B867 | A9 | A9 | Passes through Bankfoot village. |
| B868 (defunct) | Poles | Dornoch | Renumbered to the B9168 due to extension of the A9, which would have put the B868 out-of-zone. Originally planned to be merged into the B867 (now the B9167), which would have been completely out-of-zone. |
| B869 | A894 | A837 | |
| B870 | B876 | B874 | |
| B871 | A897 near Kinbrace railway station | A836 near Bettyhill | |
| B872 | A814 at Whistlefield roundabout (north). | A814 near Faslane Cemetery (south). | |
| B873 | A836 at Altnaharra | B871 at Syre, Highland | |
| B874 | A99 near Wick | Thurso | |
| B875 | A844 | Drumachloy | This road is located on the Isle of Bute |
| B876 | Castletown | A99 at Reiss | |
| B878 | Rothesay | A844 | This road is located on the Isle of Bute. |
| B879 | B842 | Carradale | |
| B880 | A841 near Brodick | A841 near Blackwaterfoot | This road is also known as 'The String' and is located on the Isle of Arran.[1] |
| B881 | Rothesay | A844 | This road is located on the Isle of Bute. |
| B882 | Tobermory | B8073 near Tobermory | This road is located on the Isle of Mull. |
| B883 | A87 | Peinchorran | This road is located on the Isle of Skye. |
| B884 | A683 at Lonmore | near Milovaig | This road is located on the Isle of Skye. |
| B885 | Portree | Bracadale | This road is located on the Isle of Skye. |
| B886 | A850 | Waternish | This road is located on the Isle of Skye. |
| B887 | A859 north of Ardhasaig, Isle of Harris | Huisinis, Isle of Harris | Follows the northern shore of West Loch Tarbert for the first half of its route Goes through Bun Abhainn Eadarra, Miabhaig, Abhainn Suidhe and Beitearsaig |
| B888 | A865 at Dalabrog | Pollarchar | In the southernmost part of South Uist Continues, unclassified, to the ferry for Barra |
| B889 (defunct) | B888 in Dalabrog | pier at Loch Baghasdail | Became a portion of the A865. |
| Ring road on the Isle of Barra | Upgraded to the A888 by 1934. | ||
| B890 | Groigearraidh | Loch Skipport | This road is located on the Isle of South Uist. |
| B891 | A865 | Peters Port | This road is located on the Isle of Benbecula |
| B892 | A865 | A865 | This road is located on the Isle of Benbecula |
| B893 | A865 | Newtonferry | This road is located on the Isle of North Uist. |
| B894 | A867 | Loch Eport | This road is located on the Isle of North Uist. |
| B895 | A857 north of Stornoway | Tolsta | Follows the western shore of Broad Bay Goes by way of Tong |
| B896 | Great Cumbrae | Great Cumbrae | This road circles the island. |
| B897 | A859 approx 6 km southwest of Stornoway | Ranais | Goes via Crossbost |
| B898 | A9 | A827 | |
| B899 | Millport | B896 | This road is located on the Isle of Great Cumbrae |
| Road | From | To | Notes |
|---|---|---|---|
| B8000 | A886, Newton, Argyll | A8003, Kames, Argyll | Is a road in the west of Cowal peninsula, Argyll and Bute.
Originally ran from Auchenbreck to Port Bannatyne. Swapped with the A886; one portion is now the B866. |
| B8001 | Claonaig | A83 at Kennacraig | |
| B8002 | A816 | Aird | |
| B8003 | near Balvicar | North Cuan | |
| B8004 | A82 near Spean Bridge | Banavie | |
| B8005 | B8004, near Gairlochy | Achnasaul | |
| B8006 | A830 | A830 | Passes through Caol
Originally ran from Dalnabreck to Daleila. Declassified in the 1960s, probably when the new section of the A861 opened. |
| B8007 | A861, Salen, Ardnamurchan | Achosnich | the main road of the Ardnamurchan peninsula and thus the most westerly numbered road on the mainland of Great Britain |
| B8008 | A830 | Mallaig | Originally ran from Inchmore to Dunballoch. Renumbered to the B9164 (itself now out-of-zone) in 1935 after the A9 was extended, which would have put the B8008 out-of-zone. |
| B8009 | A863 | Portnalong | This road is located on the Isle of Skye. |
| B8010 (defunct) | Stornoway | Brasclete | Declassified in the 1970s. |
| B8011 | Garynahine, Isle of Lewis | Timsgerraidh, Isle of Lewis | |
| B8012 (defunct) | Loch Laxavat | Carloway | Declassified in the 1970s. |
| B8013 | Lìonal, Isle of Lewis | Eòropaidh, Isle of Lewis | |
| B8014 | Port Nis, Isle of Lewis | Eòropaidh, Isle of Lewis | |
| B8015 | Lìonal, Isle of Lewis | Sgiogarstaigh, Isle of Lewis | |
| B8016 | A846 | A846 near Bridgend | |
| B8017 | A847 | B8018 | This road is located on the Isle of Islay |
| B8018 | A847 | Sanaigmore | This road is located on the Isle of Islay |
| B8019 | B8079 | A924 | |
| B8020 | Broxburn | Winchburgh | |
| B8021 | Gairloch | Melvaig | |
| B8022 | B825 near Avonbridge | B825 at Limerigg | |
| B8023 | B802, near Kilsyth | A803, near Kirkintilloch | |
| B8024 | A83 | A83 at Inverneil | |
| B8025 | A816 | Keillmore | |
| B8026 | A83 | A83 | Passes via West Loch Pier
Originally ran from Raddery to Poyntzfield. Renumbered to the B9160 in 1935 after the A9 was extended, which would have put the B8026 out-of-zone. |
| B8027 | Stornoway | Stornoway | This road is located on the Isle of Lewis. |
| B8028 | Shieldhill, Falkirk | Falkirk | |
| B8029 | Linlithgow Bridge | A706 near Linlithgow | |
| B8030 | Milngavie | Milngavie | |
| B8031 | A873 | B822 | |
| B8032 | Doune | Doune | |
| B8033 | Braco | Keir Roundabout | |
| B8034 | A81 at Port of Menteith | A811 at Arnprior | |
| B8035 | Salen | Loch Beg Bridge | This road is located on the Isle of Mull. |
| B8036 | A87 | A850 | This road is located on the Isle of Skye. |
| B8037 | A811 | B822 at Kippen | |
| B8039 | near A73 | Cumbernauld | Originally ran from Windhill to Balnagown. Extended and renumbered to the B9169 after the A9 was extended, which would have put the B8039 out-of-zone. |
| B8040 (defunct) | A82 at Laggan | A82 at Aberchalder | Declassified and now a footpath. |
| B8041 | A885 Argyll Street, Dunoon | A815 Alexandra Street, Dunoon | |
| B8042 | A885 Argyll Street, Dunoon | A815 Washington Street, Dunoon | |
| B8043 | A861 | A844 | |
| B8044 | A861 at Acharacle | near Ardtoe | |
| B8045 | Jetty at the northern tip of Lismore | St. Moluag's Cathedral, Lismore | In the Inner Hebrides |
| B8046 | A904 | Mid Calder | |
| B8047 | B792 at Torphichen | B8028 at Westfield | |
| B8048 | Kirkintilloch | Junction 5, M80 at Cumbernauld | |
| B8049 | Bearsden | Allander Toll Roundabout | |
| B8050 | Milngavie | A810 | |
| B8051 | Stirling | Stirling | |
| B8052 | Stirling | Stirling | |
| B8053 | Airdrie | Airdrie | |
| B8054 | Cumbernauld | Cumbernauld | |
| B8056 | A832 | Red Point | |
| B8057 | A832 at Poolewe | near Cove | |
| B8058 | Airdrie | B802 | |
| B8059 | B8011, Isle of Lewis | Barraglom, Great Bernera | Crosses to Great Bernera from Lewis via the Bernera Bridge |
| B8060 | Balallan, Isle of Lewis | Leumrabhagh, Isle of Lewis | |
| B8061 (defunct) | A81/A84 in Callander | Railway yard | Declassified between 1976 and 1981. |
| B8062 | Crieff | Dunning | |
| B8063 | A822 | near Luncarty | |
| B8064 | Perth Road bridge, Dunblane | Fourways Roundabout, Dunblane | Former routing of the A9 through Dunblane. |
| B8065 | Scarinish | Barrapoll | This road is located on the Isle of Tiree |
| B8066 | B8068 | Hynish | This road is located on the Isle of Tiree |
| B8067 | B8066 | Balephuil | This road is located on the Isle of Tiree |
| B8068 | near Scarinish | B6065 | This road is located on the Isle of Tiree |
| B8069 | B8068 | Caoles | This road is located on the Isle of Tiree |
| B8070 | Arianagour | Crossapol | This road is located on the Isle of Coll |
| B8071 | Arianagour | Ballyhaugh | This road is located on the Isle of Coll |
| B8072 | Arnabost | Sorisdale | This road is located on the Isle of Coll |
| B8073 | B8035 | Tobermory | This road is located on the Isle of Mull. |
| B8074 | A82, south of Bridge of Orchy | A85, near Dalmally | through Glen Orchy |
| B8075 | A84 | A811 | |
| B8076 (defunct) | Sterling Road, Dunblane | Sunnyside, Dunblane | Became a portion of the A820 sometime after 1971. |
| B8077 | A85 | A85 at Dalmally | |
| B8078 (defunct) | Station Road, Sterling | Cowane Street, Sterling | Now a portion of the B8052. |
| B8079 | near Falls of Bruar | B8019 | |
| B8080 | B816 at Falkirk | B803 | |
| B8081 | A9 at Blackford | A9 | |
| B8082 (defunct) | A9/B9006 at Beechwood Business Park | B862 Dores Road | Inverness Southern Distributor Road; upgraded to an A road with the same number. |
| B8083 | A87, Broadford | Elgol | This road is located on the Isle of Skye. |
| B8084 | A706, Whitedale Roundabout | B8028 | |
| B8085 | near Scalasaig | Garvard | This road is located on the Isle of Colonsay |
| B8086 | Kiloran | Upper Kilchattan | This road is located on the Isle of Colonsay |
| B8087 | Glassard | Glassard | This road is located on the Isle of Colonsay |
| unused |