What are the deep black stripes on highway lane markings immediately following white stripes?
A local highway* recently had it's white, dashed highway stripes augmented with a deep black strip immediately following each dash. My question is: what are these, why are they there, and what is the technology they support (if any) called?
This is a very recently replaced section of highway, so I don't think this was any sort of repainting effort. There appears to be a bit of adhesive around the edges of each black segment (but not the original white), so I wonder if it's an applied piece of plastic marking
. I've got some ideas about what it could be, but I'm not certain on any:
- Masking because the white lines were painted longer than they should have been.
- Something to ensure definitive contrast at the end of each dash to support autonomous vehicles.
- IR reflective segments to support night vision equipment.
I've also emailed MDOT
who maintains this highway to ask, but they haven't responded yet. Can any of you explain what these are?
in SE Michigan, between M-53