I'm a firm believer that if your "straightforward", "simple" street layout requires a 1 minute instructional video to try and explain what the ambiguous signs and all that paint on the road wants you to do, it's not nearly as straightforward and simple as you imagine it is.
Two stage right turns for cyclists have been introduced on Summerhall. This will make it safer and easier for cyclists to turn right onto Hope Park Terrace and from the opposite direction on Summerhall, right onto Melville Drive.