Like everyone i'm missing the F3 hud for signal indication, my work around is to use the TAB key which normally is used to pass red signals, if i come across a yellow signal i wait till i've passed it then press TAB to check next up comming signal, if its still yellow / green then you get no info, but if its red you get the permission to pass pop up informing you there is danger ahead.
I know its not perfect but it works :)
Also
For all of you that experience graphic glitches, missing tracks etc - Clearing the cache will sort it.
TS 2013 isnt perfect but RSC have done a suberb job :)
Cheers