I previously asked "he topic description says in general "Placards are often subjected to harsh conditions during transportation, including exposure to weather elements, chemical exposure, and physical damage". But then, in the specific description of the desired solution, only one environmental factor is mentioned: "The overall solution . . . must be able to survive high excessive heat". Is excess heat the most important factor in evaluating a solution, and is there a quantitative criteria anticipated for the final solicitation? (e.g. temperature and time of exposure)" and a Mr Andrew Leyder replied "Excess heat is a factor in evaluating the solution, as the placards are placed on tank cars and cargo tank motor vehicles carrying highly flammable commodities. There are no quantitative criteria for temperature, as for the exposure time, the solution should withstand excess heat for 30 minutes more."

Is there any minimum weather exposure lifespan required? Is there a maximum lifespan? Are there any suggested weather environmental qualification tests such as ASTM, or NFRC?

The topic mentions exposure to harsh chemicals, Is there any particular class of chemical we should focus on, such as acids or alkaline? Is there any particular proof test we should be designing for?

The Topic mentions in Phase I, that we should potentially look at a prototype, would DOT want that as a deliverable to Volpe, or merely part of the report?

Also, the topic does talk towards survability in high temperature, does DOT aim for the placards to be read during a fire event or for post fire Cleanup assessment? It's a little different trying to design something so people can read the markers during smoke and flame, vs afterwards when they are assessing cleanup and personnel protection. Also if the placard is meant to be read during a fire, will we be able to count on the first responders having either binoculars or IR imagers to read the placards?