Star.pngStar grey.pngStar grey.pngStar grey.pngStar grey.png

CD Lanes

From Roader's Digest: The SABRE Wiki
Jump to navigation Jump to search
CD Lanes
M1 Junctions 7 & 8 - Coppermine - 23344.jpg
The M1 between junctions 7 and 8 has CD lanes
Cameraicon.png Pictures related to CD Lanes
View gallery (6)


CD stands for Collector/Distributor Lane, which despite the name, is a separate carriageway alongside the main route intended to separate traffic wishing to continue along a route from traffic wishing to enter or exit, preventing a phenomenon known as weaving. Typically these are used on congested lengths of road with multiple interchanges in quick succession.

Where an additional lane is used as part of the main carriageway between two junctions, this is known as an auxiliary lane. These are typically divided from the through lanes by different road markings, for instance on the M4 between Junctions 42 and 43.

The first example in the UK was at Almondsbury Interchange on the M5. Later, and larger, configurations were built on the M1, M20, and M60 as part of their respective widening schemes.




CD Lanes
Related Pictures
View gallery (6)
M1 Junctions 7 & 8 - Coppermine - 23344.jpgM60 cd lanes 2.jpgM60 Clockwise - Geograph - 2762260.jpgM60, Ashton-on-Mersey - Geograph - 2762263.jpgM60 cd lanes.jpg
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 • Essential Traffic Routes
Road FeaturesArterial Road • Automatic Bollard • Balancing Pond • Belisha Beacon • 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 • Multi Lane Drop • Multiplex • No-Car Lane • Nose • Oxbow Road • Parapet • Petrol station • Play Street • 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 • Vehicle Recovery • Walking and Cycling Friendly Road • Weaving • Wig-Wag Signals • Winter Maintenance • Zip merge
Traffic CalmingBuild-Outs • Chicane • Dragon's Teeth • Home Zone • Low Traffic Neighbourhood • 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 • Model Traffic Area • 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 • LTN • MOVA • NCN • NMU • NRA • PBU • POPE • PTS • PFI • RCS • SABRE • SCOOT • SSD • SON • SOX • SRN • TEN-T • TERN • TfL • TII • TOTSO • TRO • TSM • TSRGD • UTC • VAS • VMS • VSL


SABRE - The Society for All British and Irish Road Enthusiasts
Discuss - Digest - Discover - Help