If they are paying you now for the hours you are presently working, you would be unlikely to get unemployment benefits if you quit. That would probably be seen as a voluntary quit separate from the past wages they owe you from previous work
In order to qualify for benefits, you have to demonstrate that you the reason you voluntarily separated your employment with the company was for good cause. Under the circumstances you describe, the good cause may not be sufficient, though the distance and gas mileage would be a factor. You may wish to consult with an employment attorney in your area for more specifics, especially if you are still owed back wages for work already performed.
Take a look at the following web pages put up by the EDD that thoroughly discuss the concept of a voluntary quit. Not all resignations are considered a voluntary quit. There are many circumstances that can be considered good cause to quit a job and still get benefits.
Apply for benefits and be sure to explain the good cause for your quitting the job. Good luck to you.
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