User:Techhead7890/sandbox
Nov 2015 May 2024
Docu2 (the third time I've used this testbox)[edit]
What I know: the [ makes a left bracket; [. The above was transcluded from User:Techhead7890/doc before it was substituted.
[edit]
Docu[edit]
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breakstuff - OK great. This is the part in between the table and the actual documentation transclusion.
TROLL
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Interchange (road) # System - minor touch ups to process tomorrow[edit]
CHECK CAPTIONS AND LABEL DIFFERENCES IF APPROPRIATE
Explain semidirectional turns in terminology, T-interchange sections.
Cloverleaf: note the presence of directional turns on the (same) side of traffic.
Stack interchange[edit]
A stack interchange is a four-way interchange whereby a semi-directional turn across opposing traffic and a directional traffic-side turn are both available. Usually access to both turns is provided simultaneously by a single offramp. Assuming right-handed traffic, in order to cross over incoming traffic and go left, vehicles first exit onto an off-ramp from the rightmost lane. After demerging from right-turning traffic, they complete their left turn by crossing both highways on a flyover ramp or underpass. The penultimate step is a merge with the right-turn on-ramp traffic from the opposite quadrant of the interchange. Finally an onramp merges both streams of incoming traffic into the target left-bound highway. As there is only one offramp and one onramp (in that respective order), stacks do not suffer from the problem of weaving, and due to the semi-directional flyover ramps and directional ramps, they are generally safe and efficient at handling high traffic volumes in all directions.
A standard stack interchange includes roads on four levels, also known as a four-level stack: including the two perpendicular highways, and one more additional level for each pair of left-turn ramps. These ramps can be stacked in various configurations above, below, or between the two interchanging highways. This makes them distinct from Turbine interchanges, where pairs of left-turn ramps are separated but at the same level. There are some stacks that could be considered five-level; however, these remain four-way interchanges, since the fifth level actually consists of dedicated ramps for HOV/bus lanes or frontage roads running through the interchange.
Stacks are significantly more expensive and more land consuming than other four-way interchanges, and additionally may suffer from objections of local residents, because of their height and high visual impact. Large stacks with multiple levels may have a complex appearance and are often colloquially described as Mixing Bowls, Mixmasters (for a Sunbeam Products brand of electric kitchen mixers), or as Spaghetti Bowls or Spaghetti Junctions (being compared to boiled spaghetti).
Turbine[edit]
Place closer to stack as a variant. Change text to follow + rewrite.
Cloverstack[edit]
after turbine.