Two weeks ago, Reasonrules offered a suggestion on striping -- I shared that I would pass the suggestion on to our research team. This is the information I received back from them -- I have not edited it in an effort to make sure that I don't misstate or misinterpret their response:
"It is ironic, things we do not want to last or be seen (like spilled paint on the road or scars from removed pavement markings) are the things that we see for a long time. The predominate reason removal scars are so visible is the difference in texture as you pointed out. With grinding being the predominate form of pavement removal this normally results in a scar or groove that is slightly below the surface of the pavement, which reflects light differently that the surface around it (or casting different shadows based on the groove). Unfortunately, the attributes that make a scar itself more visible will actually decrease the performance of pavement markings placed on/in it.
• The paint must be applied thick enough to retain the glass beads that make the pavement marking visible at night in any weather
• Rough pavement also has a serious negative impact to the retroreflectivity of the glass beads (night time visibility). We have documented this in the field and the visibility of the line can be decreased as much as 50% for no other reason that the pavement surface having increased texture.
• Placing a line in a groove has been proven to also negatively impact wet night time line performance as it submerges the glass beads that make the line visible at night.
One of the biggest issues with wet night time visibility of our pavement markings is in fact ambient light and road way lighting that is prevalent in urban areas like St. Louis. When the roadway is wet and there is ambient or roadway lighting present (even light from the headlights of an oncoming car) that light reflects and refracts off the surface of the water and overpowers any light that is being returned to the vehicle by the glass beads in the pavement markings. One of your (St Louis) striping crew commented to me last year that he was coming into work one day early when it was dark and raining and there was a power outage along I-255. Without all the lighting in the area he said the roadway markings were so much more visible it surprised him.
Wet night time visibility is one of the holy grails of pavement markings and industry invests a lot to try and crack it, while improvements have been made they are limited, costly and are not very durable so they are short lived.
The glass beads in the paint are essentially small curved mirrors, the light enters the bead and is bent down, reflects of the back of the bead where it is in contact with the paint and returns the light back along the same path carrying the color of the paint with it. So if light cannot get into the bead, due to water covering it for example, the bead cannot return the light. Ironically, there was a case were a district tried to cover a white edge line with black paint. In a short time the black paint was polished off of the glass and while you could not see the line during the day it was as clear as a normal line at night, this is due to the fact what you see at night is not the painted line, but the colored light coming from the glass beads. So anything that effects the performance of the glass bead will affect the visibility of the line."
The City is applying in early 2017 for a federal grant to improve the Compton bridge. Beyond improving the long term structural stability of it, this project will also upgrade the sidewalk and roadway surface.
The contractor is responsible for maintaining temporary striping until the final resurfacing is complete in the spring. We will notify the contractor to check conditions on the stretch of Delmar you observed.
Please email me at email@example.com, and provide the name of the street that exits onto Reavis Barracks. Our Operations Division will investigate. David Wrone, St. Louis County
In the case of personal property damage to your vehicle you would need to file a claim with your insurance company along with a police report. The insurance company would then pursue action as needed.
You are correct and we have already discussed options for extending pick up as you noted. We will notify everyone with more details as they become available.
We will look at the conditions you describe in the AM rush & respond accordingly.
We will look into the signing at this intersection as well as at the plans for the newest GRG RDP greenway extension to see what can be accomplished in this location.
I'll check with our site plan review group to see what restrictions we put in place for this project. If the builder doesn't have permission to keep that lane closed 24/7, we'll address the issue with him. David Wrone, St. Louis County
We will have our folks review the signal timing on 20th & 18th streets as well as coordinate that effort with MoDOT as some of their signal bisect the City's.
We will take a look at this and see what we can do with it. Andrew Gates, MoDOT Communications
The detour for WB Forest Park Parkway is Vandeventer/I-64/Skinker. Note that intersection of Kingshighway & FPP will remain open throughout construction except for the existing underpass itself. The Kingshighway bridge project near Shaw will not reopen to traffic until April 2017 due to unforeseen delays.
We expect to reopen all lanes and both ramps for the winter next weekend (December 9). We will have additional work southbound and northbound next year. Andrew Gates, MoDOT Communications
That is a decorative light that is not a stock item for the City's responsibility. We maintain it in terms of repairs but the purchase of materials due to damage is done through a non-City entity that originally paid for the special installation. I will check but it appears the pole may have been put back up but the light fixture is on order still.
Grand is currently fully open to traffic; however, we have some additional work to do next year (landscaping and the like); We are expecting to have all the I-44 lanes open after we complete some pavement repairs and remove the remaining barrier (which may be as late as the weekend of December 9). Andrew Gates, MoDOT Communications
I'll have our traffic engineering group investigate. However, at this point, I'm not sure what the extent of our involvement would be, as the City of Des Peres maintains Des Peres Road, while we maintain Dougherty Ferry. David Wrone, St. Louis County
It is very difficult process to get a road changed to interstate status. We do see the value of U.S. Route 50 as an alternate to I-70 and as funding permits, we will continue to make improvements to update and improve U.S. Route 50. Andrew Gates, MoDOT Communications
I apologize that we were not able to get to the repairs along Kingshighway as originally planned. Our crews have not been idle, rather they have been addressing a number of other locations as well as their other projects. I assure you we will get to it and again I am sorry for the inconvenience this has been to you and others.
The Kingshighway viaduct project has run into unforeseen delays and will not be reopened to traffic until April 2017. The Hampton signal cycle lengths have not been changed due to that project however. We routinely monitor our arterial timings so that they remain relevant to the traffic volumes and patterns that they service.
I have passed on your concern on the ramp from Midland to Lindbergh to our maintenance team to see what they might be able to do. Andrew Gates, MoDOT Communications
We can speak with MoDOT on the sign placement for the highway messaging. We will check the video detection at the intersection of Clayton & Boyle to make sure it is operating correctly in terms of vehicle actuations.