I had been told at one time that it was Federal Transportation Law and that if a bus was full at that stop for ECVs/wheelchairs, it was considered a full bus and no one else could be loaded. I did have a link for the information at one time, but the computer it was on died and I was no longer able to find the information on the computer.
I contacted the bus driver who gave me the information and he does not have a link to it either. Since I have no reference proving it is Federal Law, I have not been posting that for the last few years. I know I had read it, but without a reference, I have no proof; it may have been true, but changed.
They do/did load ECVs and wheelchairs first for some very practical reasons though:
1) If no one is on the bus, there is much more space for manouvering the wheelchair/
ECV safely on the bus.
2) With no one on the bus, it is faster and easier for the driver to do all the steps he/she needs to do to safely get the wheelchair/ECV on the bus and tie it down. With people on the bus, there is often a constant shuffling of position - "Please stand here while I do this. Now, I need to be there, so could you please move there."
3) No one has to move out of seats that make the designated wheelchair tiedown spot.
We have been in some of the wider lines that are wheelchair accessible, but were at OKW, at times when the bus stop was not very busy. The driver still loaded us first, since we were within the first 10-15 people in line. He just asked the other guests to stand aside so we could pass. They could see we were a party of 4 and that they would still get seats. If it had been different, I'm not sure they would have been so nice about it.
The 'old' lines had some way to pull guests with wheelchairs out of the line - a chained gate or something similar. The new lines are solid metal thru the whole line, so once you are in the line, you have to stay in line or pass by people.
I'm sure the changes came about because other guests wrote and complained about guests with wheelchairs and ECVs being loaded first. The stories often include reports that one guest in a wheelchair loaded with "20 members of their party." There has always been a policy of a 'party' being 5 people plus the person with a disability, so if bus drivers are loading more than that, they were not following their own party. I think the "20 people" is probably a gross exaggeration and I have things posted that I know are not true, like reports that "4 scooters pulled up as the bus was getting ready to load and all 4 got on with 10-20 members of their party, filling the bus and making the rest of us wait for the next bus." Since most buses will hold a maximum of 2 ECVs and a few will hold a maximum of 3, I know this report is not true right away.
I do think that other guests will start to complain when it takes drivers longer to load the wheelchairs/ECVs. I hope guests with wheelchairs/ECVs also complain if they are not being treated fairly - i.e. not being loaded because the bus is too full when there is still room for people to walk up and get on.