How difficult is communicating . . .

We flew on US Airlines Express (DCA) which meant an exit out to a bus for a ride to the plane. It was extremely warm in DC 97 degrees. The air was on in the bus but the doors were left open so the exhaust from the bus and hot air mixed with 30 plus people "standing" for over 20-25 minutes were extreme. There was not a bus driver during this time period and the bus engine shut down (which meant no air). Although this was brief, it added to the tenseness of the situation. Then, finally a driver appears, doors are closed and we are on the move . . although very brief. We now have stopped with a bus in front of us. After a few minutes, an automated message comes on that says "you will be delivered to your plane shortly" or something to that effect. Once again we are all left to wait "standing" on a bus that is getting warmer by the minute (yes there was air conditioning -- however, it was uncomfortable). Another 20 minutes go by without a word from anyone. The bus driver is in her own section --there is a separate glass compartment -- you cannot talk to her. Also there are signs that says "no one can get off the bus except for emergencies". It would have been nice if SOMEONE could have told us something. The plane was scheduled to take off at 3:10 PM and at 3:10 PM we were still on the bus. However, after we got on the plane, the pilot announced "thank you for your patience, we had a little problem with a broken seat. That is now fixed and we will be on our way." It would have been very helpful just for someone to say to everyone standing in a hot bus why we were waiting. At least we would know there was an end in sight. Some were becoming a little agitated which caused me great concern. Then, we had quite a delay on the runway. I assume since the plane was late taking off, that put us behind many flights to take off. I have flow Delta many times. Pilots will announce that "we are 7th for take off" or whatever. At least they keep you in the know. We will probably avoid US Air in the future.