I-95/I-295 Jax Port/Downtown interchange

[southsider1015]

FDOT has wanted to get rid of that "exit left" config at 95/295 for years. FHA considers them unsafe, especially for trucks as they have to merge across a passing lane to reach it.

If that's the case, why did they build this in to the I-95/SR9B (Future I-795) interchange? They literally built a modern version of the original I-95/I-295 North interchange.

Are you sure we are talking the same thing?  There is a difference between a wye and a left hand exit.

Left hand exits are safe if they are done under a control ramp, typically one lane.

They were once popular to design in the 50's and 60's, but the  issue with truck safety grew in the 70's and by the 80's many DOT's were replacing them.

Disagree.  Left-handed exits, regardless of whether they are single lane or multi lane, or whether what they fly under or fly over, are considered unsafe for trucks for the lane changes.

Why did 9B get built with a left handed exit?  We're still scratching our heads, but it likely was a financial decision.  Left-handed exits are cheaper than right handed exits.

The project includes improvements to the NB I-95 to WB Airport Rd loop ramp.  Site distance clearing, widening and adjusting the guardrail I believe.  Should help a bit.  Similar loop ramp improvements to the Southside / JTB loop ramp improvements project occurring right now.

Also, I'm in the industry, and have never heard if this "wye" configuration.

Are you talking about the 9b split from 295 or the 9b/95 intersection?

Also, I dont see any accomodation for the future north jax rail bypass unless they expect it to bridge over.

I believe Steve was talking about I-95 and SR 9B, not I-295 and SR 9B.  And now I understabd your "wye" term with I-295 and SR 9B.  Not a left handed exit, but a split of two high speed (eventual Interstate) systems, rather than a ramp.

Not sure on the future rail plans.  Although I'm pretty sure you never want to try to build a rail bridge over roadway.  Trains don't like those types of grade changes.  Roadways almost always go over rail in Florida.

[Steve]

I believe Steve was talking about I-95 and SR 9B, not I-295 and SR 9B.  And now I understabd your "wye" term with I-295 and SR 9B.  Not a left handed exit, but a split of two high speed (eventual Interstate) systems, rather than a ramp.

Not sure on the future rail plans.  Although I'm pretty sure you never want to try to build a rail bridge over roadway.  Trains don't like those types of grade changes.  Roadways almost always go over rail in Florida.

Correct, I-95 and SR9B - it's designed with a Left Exit, though the traffic going straight will likely be much less than making the left onto I-95 South (assume you're coming from I-295)