I've owned this 2004 Jazz for about a year (my first car!), and while it's given me no real trouble, I'm worried about a high pitched continuous but occasional squeaking sound after a period of highway driving - definitely over half an hour. The sound comes from one or both the front wheels (I feel it could be the driver side but that could also be my ears being biased), and seems to be at the same loudness independent of speed on the road or speed of the engine. The sound usually seems to start and stop based on the position of the steering, but sometimes starts and stops even when driving in a straight line.
I noticed it months ago, but haven't been driving much, so it's been quuite rare. Recently did a road trip, and on a couple of high mileage days it simply wouldn't stop - it's so loud I'd have to roll the windows up for us to enjoy the radio! On one such instance, I stopped at a pump, and had my wife get out and listen while I drove around the pump. She confirmed it was coming from one of the front wheels, and suggesed driver side but again wasn't sure. The sound is always only after a period of highway driving and always stops after a few minutes' break.
Given I probably wouldn't be able to schedule a mechanic visit right after a long highway drive, is there anything I can ask my mechanic to check? I do not like the thought of ignoring noises as loud as this, and given this car is an old and cheap run-around for when I can't take the motorbike, I'd rather get it sorted before it turns into a breakdown and/or an expensive repair job.