Contents 1 Right-of-way 2 Turns 3 Variations 4 Image gallery 5 References

Right-of-way[edit] Some T junctions are controlled by traffic lights, but others rely upon drivers to obey right-of-way rules, which vary from place to place. For example, in some jurisdictions, vehicles on the right always have the right-of-way (even at T junctions),[1] while in other jurisdictions, vehicles travelling on the "through" road of a T junction have the right-of-way, meaning that vehicles approaching the "major" road must allow through traffic to pass before joining the flow of traffic. In the People's Republic of China, going straight on red when approaching a T junction on the main road with the intersecting road on the left was permitted until the Road Traffic Safety Law of the People's Republic of China took effect on 1 May 2004. In Taiwan (administered by the Republic of China), when at least two vehicles reach a T intersection without a working traffic light, the vehicle on the side road is to yield to any other vehicle straight on the main road. If two vehicles want to turn left, the vehicle on the left is to yield.[2]

Turns[edit] When one road at a 3-way junction has a higher traffic volume than the other (and particularly when the roads are perpendicular to each other), turns are characterized as "right-in", "right-out", "left-in" and "left-out". A turn "in" represents a turn from the major road into the minor road. A turn "out" represents a turn out of the minor road onto the major road. A 3-way junction allowing all four of these turns is characterized as "full-movement". These terms also apply to turns between roads and driveways.[3][4]

Variations[edit] An experiment was done[by whom?][when?] in Illinois, United States to allow going straight on red (like a right turn on red) when approaching a T junction on the main road, with the intersecting road on the left. It was a failure. However, at some T junctions where the main road includes at least two lanes on the side away from the intersecting road, the farthest (rightmost, in areas where traffic drives to the right) lane is given the right of way to proceed straight through the intersection at all times, denoted by a "green arrow" signal if a traffic light is installed at the intersection. In such cases, often that lane is also specially delimited with pavement markings or other lane separation devices, to keep left-turning traffic on the intersecting road from colliding with traffic proceeding through the intersection on the main road. There are now safer variations of this, called continuous green-T (or seagull) intersections, that have a left turn lane off the main road either channelized or otherwise separated from traffic going straight, which allows for a traffic signal on only one side of the road.[5]

Image gallery[edit] T Intersection Sign in Taiwan with no more road straight ahead T Intersection Sign in Taiwan with side road on the left T Intersection Sign in Taiwan with side road on the right Y Intersection Sign in Taiwan 3-way Intersection Sign in Taiwan with side road on the right but not right angle 3-way Intersection Sign in Taiwan with side road on the left but not right angle

References[edit] ^ SGI. "SGI - Driver's Handbook - Right of way".  ^ Clause 2 of Section 1 of Article 102 of the Road Traffic Security Rules (s:zh:道路交通安全規則) ^ Staff. "Technical Summary (FHWA-SA-10-002)". Access Management in the Vicinity of Intersections. Federal Highway Administration. Retrieved August 31, 2012.  ^ Joe G. Bared (January–February 2005). "Improving Signalized Intersections, Publication Number: FHWA-HRT-05-003". Public Roads. Federal Highway Administration. 68 (4). Retrieved August 31, 2012.  ^ An Applied Technology and Traffic Analysis Program ([1]) Wikimedia Commons has media related to T junctions. Wikimedia Commons has media related to Y junctions. v t e Streets and roadways Types of road Limited-access Freeway / Motorway Dual carriageway / Divided highway / Expressway Elevated highway By country Australia Brazil China Croatia Czech Republic Germany Greece Hong Kong India Ireland Italy Pakistan Portugal Spain United Kingdom United States Main roads Arterial road Collector road County highway Express-collector setup Farm-to-market road Highway Link road Two-lane expressway 2+1 road 2+2 road Parkway Super two Trunk road Highway systems by country Local roads Alley Backroad Bicycle boulevard Boulevard Country lane Dead end Driveway Frontage road Green lane Main street Primitive road Road Side road Single carriageway Single-track road Street Sunken lane Other terms Channelization Concurrency Detour Hierarchy of roads Private highway Route number Special route Business route Street hierarchy Toll road Road junctions Interchanges (grade-separated) Cloverleaf Diamond Free-flow Directional T Diverging diamond Parclo Raindrop Roundabout Single-point urban (SPUI) Stack Three-level diamond Trumpet Intersections (at-grade) 3-way junction Bowtie Box junction Continuous flow Hook turn Jughandle Michigan left Offset T-intersection Protected intersection Quadrant roadway Right-in/right-out (RIRO) Roundabout Seagull intersection Split intersection Superstreet Texas U-turn Traffic circle Turnaround Surfaces Asphalt concrete Bioasphalt Brick Chipseal Cobblestone Concrete Reinforced concrete Corduroy Crocodile cracking Crushed stone Diamond grinding of pavement Dirt Full depth recycling Glassphalt Gravel Ice Macadam Pavement milling Permeable Plank Rubberized asphalt Sealcoat Sett Stamped asphalt Tarmac Texture Road hazards Aquaplaning Black ice Bleeding Crosswind Dead Man's Curve Expansion joint Fog Ford Hairpin turn Level crossing Manhole cover Oil spill Oversize load Pothole Road debris Road slipperiness Road train Roadkill Rockfall Rut Speed bump Storm drain Washboarding Washout Whiteout Space and time allocation Barrier transfer machine Bicycle lane Climbing lane Complete streets Contraflow lane Contraflow lane reversal High-occupancy toll lane High-occupancy vehicle lane Lane Living street Managed lane Median / Central reservation Motorcycle lane Passing lane Pedestrian crossing Pedestrian zone Refuge island Reversible lane Road diet Road verge Runaway truck ramp Shared space Sidewalk / Pavement Shoulder Street running railway Traffic calming Traffic directionality Traffic island Traffic lanes Traffic signal preemption Unused highway Wide outside lane Woonerf Demarcation Bollard Botts' dots Cable barrier Cat's eye (road) Concrete step barrier Constant-slope barrier Curb F-Shape barrier Guard rail Jersey barrier Kassel kerb Noise barrier Raised pavement marker Road surface marking Rumble strip Traffic barrier Traffic cone Structures Bridge Causeway Overpass / Flyover Underpass / Tunnel Glossary of road transport terms Road types by features Retrieved from "" Categories: Road junction typesHidden categories: Articles with specifically marked weasel-worded phrases from September 2012All articles with vague or ambiguous timeVague or ambiguous time from September 2012Commons category with local link different than on Wikidata

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