TIL the raised reflectors in between lanes on the highway also indicate direction. Normally they reflect white or yellow but if they appear red, it's becasue you are going the wrong way. :
Road Lane Lines And Reflectors Stock Photo | Royalty-Free | FreeImages
Pavement Markings – A+ Driving School
Why do some roads have reflective markers in the middle of the road? I understand reflectors along the lane dividers, but it's annoying to run over them in the traffic lane. -
Pavement Markings and What They Mean - Driversprep.com
Colorado needs these reflector markers for lanes on the highway especially when it rains. Wonder who you talk to about this? : r/Denver
A Road reflector lane marker in the street Stock Photo - Alamy
Reflective Markings & Delineators - Rhode Island Rhode Island Department of Transportation
Wrong Way Pilot Project
Decoding Cat's Eyes: A Global Color Guide to Reflective Road Markers - 99% Invisible
Highway reflectors hi-res stock photography and images - Alamy