re: Speed Limit on Staring Lane

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I'm genuinely interested.

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I was trying to find out if Staring Lane is designated a Louisiana state highway. Wiki says it's LA 425, but I don't know if I should trust that. There isn't anything on the GLP's website that says how the road is designated.

If Staring Lane was 35 MPH before the widening, they'll definitely design it at a greater speed (I joked about that earlier because the projects I've worked on have all outlived my 9 years in the design phase, so all I know is design speed and not posted speed...you're right, in school and in practice the design speed is supposed to be greater than the posted speed). The City/Parish likely tried to post the speed higher than 35 MPH given the new widened roadway and increased capacity that will handle the design and future demands (these are projections...educated guesses...out to 2019 and 2030).

The problem with Staring is that homes front the road, not entrances to neighborhoods. I get the lower speed limit, but this is a Baton Rouge problem and not necessarily a design problem. Rather, a Baton Rouge planning problem.

Staring is residential, however it's now an essential link to the interstate. And it will be even more so when it's extended to Nicholson/LA 30.

State highways are usually designated by the State as a certain classification. Not all classifications are created equal. There are rural and urban classifications of freeways, highways, arterials, collectors...all with different speed limits based on ADT. You probably know this, you seem kinda engineery. That's what governs Staring's design speed from the engineering side.