Both shots were problably caused by handshake blur. This is obvious in the first pic as 1/8 of a second is not enough to freeze the action. It looks underexposed as well.
The second pic I assume was shot on a tripod? Maybe the rish of air form the passing vehicles caused some vibrations on the camera? Did you shoot with a mirror-lockup to prevernt the mirror slap vibrations? Perhaps its the 'bloom' of the overexposed lights that makes it look OOF..