[JasonB]

If you want to focus on work, you've definitely come to the wrong place.

Here's a layout which keeps most of the elements of your first design, which I think is sound enough. But I've changed the right hand side so that there isn't a corner underneath the bridge, where obviously you are unsighted, and where it might be awkward to get to the car to retrieve deslots.

It also gives you an option for an extra lane changer, or as I've drawn it here, just replaces the one that's hidden under the bridge with one that's more visible, for the same reasons as above.

   

           

As has been mentioned, whatever design you come up with, no matter how good it looks, you will almost inevitably change it and tweak it once you start driving on it.