I called the 800 number for Lexus and complained about this. I noticed that the non-navigation systems show trip time on their little black and white LCD, but the nav version does not. I guess they expect us to calculate it from the average time and distance. I just received an RX-350 loaner that must have the latest and greatest Nav system and guess what - no elapsed time either. I was hopeful that an update disk would do it, but it doesn't look like it.