Pedestrian and Bike Lane Separation for major transport route (12 lane road) design concept
This is another design that stemmed from the previous Pedestrian Bike Lane separation design concept for 6 lane road. That is assuming that the road is not a public transport route so no provisions for terminals for jeeps and buses are present.
This one utilizes 6 lanes per direction. 4 lanes are reserved for Private Vehicles and U-Turning vehicles. The 2 lanes are reserved for Public Transport Buses (and optionally, jeeps) There are bays on which passengers can load or unload.
For the U-Turn, there is a bottle neck at the U-turn until the u-turning vehicle joins the mainstream without conflic.
The difference from the previous design is that the lanes for the pedestrians and bikes are unified and elevated from the road. there is a little island of vegetation that physically separates the pedestrian and bike roads.
You could drop any question in my Tumblr Ask if the design now baffles you if you need clarification or suggestions :)