Double Left Turn Lanes Followed by Lane Drops

[bassoon1986]

This is a particularly not-nice one that surprised me a few weeks ago. Exit ramp from I-10 WB turning left onto the Ambassador Caffery Pkwy overpass in Lafayette, LA. It's four lanes south of the bridge, and it's a busy route so a wider bridge would definitely help this area.




iPhone

[jakeroot]

^^
That's interesting. It's the reverse of the most common "double left followed by lane drop" scenario: left turn from arterial to on-ramp. I don't see the opposite (pictured above) too often.

[webny99]

^^
That's interesting. It's the reverse of the most common "double left followed by lane drop" scenario: left turn from arterial to on-ramp. I don't see the opposite (pictured above) too often.

I actually sees the pictured (though not with ramps at such awkward angles  ) much more often. Double lefts to on-ramps are pretty rare, and I want to say the new one on NY 15A at I-390 is one of the only ones in the area.

[jakeroot]

Here's a video to follow up an earlier post of mine. At the intersection of Main Street and the Dunsmuir Viaduct in Vancouver, the right left-turn lane merges into the left lane almost immediately after the left turn. It is certainly the shortest of this type of situation that I've ever encountered.

Skip to 1:00 for the actual left turn. I tried to include some context.

https://youtu.be/q3dditaRyB8

[US 89]

Here's a video to follow up an earlier post of mine. At the intersection of Main Street and the Dunsmuir Viaduct in Vancouver, the right left-turn lane merges into the left lane almost immediately after the left turn. It is certainly the shortest of this type of situation that I've ever encountered.

Skip to 1:00 for the actual left turn. I tried to include some context.

https://youtu.be/q3dditaRyB8

Here's an even shorter one: on the left turn from 1st Avenue to I-5 north in San Diego, the two lanes merge together during the turn.

[jakeroot]

Here's a video to follow up an earlier post of mine. At the intersection of Main Street and the Dunsmuir Viaduct in Vancouver, the right left-turn lane merges into the left lane almost immediately after the left turn. It is certainly the shortest of this type of situation that I've ever encountered.

Skip to 1:00 for the actual left turn. I tried to include some context.

https://youtu.be/q3dditaRyB8

Here's an even shorter one: on the left turn from 1st Avenue to I-5 north in San Diego, the two lanes merge together during the turn.

Yikes! That is damn short. Although from a purely practical standpoint, it doesn't seem quite as formidable as the Vancouver example due to the wide paved area (room for two cars if one doesn't properly merge for quite a while). In the Vancouver example, failure to merge is punishable by barrier impact!