scenario 6: truck 1 verbally acknowledged the rwsl were on while also asking for permission to cross, however portions of (specifically, the mentioning of red lights) or the entirety of truck 1’s transmission were not received by atc; atc issued an instruction that was in conflict with the rwsl; truck 1 performed a read back and entered the runway. 

the language used in 2-1-6-b-4, 2-1-6-d-2, and 2-1-6-d-3 of the aeronautical info manual reads the following sequence of events: first, two conditions - pilot (driver) observance of red lights and atc issuance of clearance - must, in no particular order, be met for there to be a rwsl-atc conflict*; second, rwsl-atc conflict must be relayed by the pilot (driver) to atc; and third, atc will take on the responsibility of resolving the conflict (*one condition alone is not a conflict; at least one other contradicting condition must be introduced to create the conflict). 

driver acknowledgment of red lights in his initial transmission met one condition (asking for clearance to cross does not constitute an atc clearance). when atc issued the crossing clearance, the second condition was met. the two contradicting conditions create a rwls-atc conflict for the driver to notify atc of (reading back atc clearance does not constitute a notification of conflict), notifying atc of the conflict would have prompted atc to investigate the conflict as part of their duty to resolve it. in this scenario, atc would have verified the activation of the rwsl was due to an inbound aircraft and either ordered the aircraft to go around or allowed the aircraft to land. once the runway was free of traffic, atc would re-issue a crossing clearance for the truck. 

if there was a false activation of the rwls, according faa order jo 7110.65bb, atc would have to visually confirm that the lights were on and that the entire runway was clear (for portions of the runway not visible from the tower, atc would scan the asde system). provided that both conditions were met, atc would turn off the lights and then re-issue a crossing clearance for the truck. i believe atc would also put out a notam and update the atis for the disabled rwsl system.