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[quote=Anonymous][quote=Anonymous]
Road diets only cost less if they include stripping. But many also end up including reconfigured sidewalks, pedestrian islands, hawks signals, etc.  those are expensive. Much more expensive than painted curb bump outs or speed humps.

Road diets are typically acceptable on roads with ADTs under 15k. They get somewhat iffy on roads over 20k and very, very iffy on roads over 26k. Many DC area arterials exceeds 15k. Like I said? It depends on many factors. Anyone who denies that is pushing a separate agenda.

Also, narrowing the width of a lane can reduce vehicle speeds. Reducing lanes is not the only way to reduce speed and it’s not always very successful. [/quote]

Reconfigured sidewalks, hawk signals are other forms of traffic calming.  A road diet per se is a reduction in the number of lanes, and while it can go along with hawk signals, a hawk signal is not a road diet.  You can have either without the other.

4 to 3 road diets CAN enable pedestrian islands, but don't always.  And pedestrian islands can be done with only striping at little cost.

Speed humps are generally not recommended on higher volume roads.

Narrowing lanes is called a lane diet. That is another form of traffic calming that can be appropriate in some locations.

I agree that  a 4 to 3 road diet needs to look at local configurations - esp where the volumes are higher, you need to look at local considerations and examine actual changes to delay.  [/quote]

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