Jim Carter wrote:

I’ve followed the lengthy and somewhat heated discussion speculating
responsibility in the LEX accident, but I’ve not seen any thread on
improvements other than a few comments about traffic lights on runways,
or more people added to the system to double-check the double-checkers.
I’m interested in what the industry might do to achieve a technical
solution with relatively small front-end cost and very, very little
operational cost. (As you suspect, I have nothing to do with the
government or any of its agencies).

The fixes are already in place for what happened at LEX.

The concerns of the industry are (correctly) about runway intrusions,
such as happen at places like LAX far too often.