23 March, 2012

Flyover Design

Few months back newly built flyover on Solapur road, at Mega center and Sahyadri Hospital corner (see location in map below) was opened for public.

View Larger Map

Simple observation of the flyover design would create lots of doubts and questions in anyone's mind.

Most shocking observation is that vehicles cross paths on the top of flyover. Very strange and unsettling, because common sense tells that flyover should make it possible for vehicles to travel without having to stop (for signal or pedestrians crossings etc.) anywhere. In other words, flyover should help move the vehicle fast (this does not always reduce traffic congestion, but that is another topic for discussion).

Is this flyover design correct?
Note: Above picture stitched image created using 2 different photos taken from top of nearby building. An object was blocking the middle portion of flyover, so I had to remove it and re-create flyover using photo editing.

You can easily see in above picture that vehicles have to be very careful or else collision can easily occur on the flyover (area marked in red circle). Also vehicles must slow down and stop on the flyover to allow other vehicles to pass. As of now, there is NO traffic signal on the flyover. Are they (Pune Municipal Corporation) going to install one? I don't know. If they do that would some kind of world record "A flyover with traffic signal".

Some unanswered questions:
Q. If this flyover design safe? Is crossing on flyover a good idea? 
Q. If NOT, they who approved this design?
Q. Is it worth Crores of rupees (people's money) spent on building it? what benefits does it provide?
Q. If it is flawed design, wow can we avoid this in future.
Q. Would it be some kind of world record if traffic signal is installed on a flyover?

Any ideas?

Note: If you are civil engineering teacher/student, please feel free to use this post and photo for classroom discussion.

Update (26 Dec 2014): Here is news article about Pedestrian First's proposal to modify the flyover.