Bus Stops... Traffic bottle necks??

I am not sure if anyone else noticed but some of the bus stops are put in IMHO, really strange strange locations. Some should be IMHO relocated to ease off traffic.

E.g. 1
The bus stop in front of Le Meridian. Where not too far away (about 50m or less), is a major turning into the CTE and most if not all the buses goes straight. And to make it worse, there are 2 lanes that turns left into the expressway and the buses need to squeeze "against" traffic to be able to move straight across the junction.

E.g. 2
The bus stop near Braddell & Carmichael Road. This bus stop is right after the entrance of the underpass. If you have been on that road, you'll know what I mean. @ the entrance, there is only 1 lane filtering out of the underpass. And there are always cars who are turning right into AMK jammed packed there. You can imagine what happens when a bus stops there.

E.g. 3
It's the opposite side of the road of e.g. 2.

Sometimes I wonder why are under passes built? To ease traffic? But then why these bottle necks? Are they unaware of it?

Why are there more and more of these 1 exit lanes that opens up into multiple lanes? *from the top view... it does look like a hour glass.
Example, the road right in front of Upper Serangoon Shopping Center.
*I really hate it when someone stops there to buy durians, or when a bus stops there... The traffic jam there is a nightmare.
funny thing is... the jam was never there before the building of the "flyover".

Who can we talk to for such issues? SBS? LTA? Sigh...

Are we building for the sake of building and not for the sake of improving road conditions?

*Dun even get me started on road markings.... The ones @ Paya Lebar are a nightmare!!!