This is the most important aspect of the job interview arriving on time. The job interview is deemed as a very important appointment, and being late is a cardinal crime with gravity that may cause you to lose that job opportunity. Your attitude regarding time will send the wrong messages to the employer, and will tell a lot about your lack of professionalism. Being stuck in traffic is a very lame and downright unforgivable excuse. It is better to be early by one hour than to be a minute late.