You probably know it helps to answer a few common questions with a friend prior to an important job interview so you can prepare adequately, but if you don't ever make it to the interview, none of that will matter. In the days before, you ought to drive out to take yourself through the process of getting ready and actually going.
Alison Green, writing for US News, suggests getting suited up and making the drive out to the interview prior to it actually happening:
Try to do this around the same time of day as your interview, so that you know what traffic to expect. The point? You might discover that your directions are wrong or a major road you were counting on is closed for construction, or that traffic is far worse than you anticipated. By rehearsing ahead of time, you'll be able to ensure you allow enough time on the actual day and don't get lost.
In some circumstances, you might struggle to find the time to prepare yourself and make the drive, but it provides you with important knowledge to help you make it on time. You can always double up on activities too. If you like something in the same part of town as the company, plan an errand or meal over that way to pursue after your test drive.