Problem 4 - Page 6 of 6
Problem 4: Clifton Country Road
To treat the problem in this more systematic
manner, we need to do an unsignalized intersection analysis at the two-way
stop controlled intersection just to the north (visible in the
photograph). We will also do an analysis of the all-way stop controlled
intersection beyond. We will also look at the two-way stop controlled
intersection to the south. This means doing analyses based on Chapter 16 and
Chapter 17 simultaneously.
In doing this, we also
have to be careful to account for evidence of modifications to typical driver behavior. For example, when the westbound left-turn bays get
congested, drivers that want to go south turn right instead, go north to the TWSC intersection at Old Route 146,
then make a U-turn to again
be headed south. They know the southbound approach will get a green before
the next time the westbound left turn does. This action adds traffic to the Old
Route 146 intersection and lengthens the queue on the southbound approach.
demonstrates the intersection may require other analysis methods. We may
consider using a network analysis package that can simultaneously look at
the performance of all the intersections we’ve discussed.
return to the same discussion format used initially in the case study. We
revisit the basic issues to identify the problem, how it should be
approached, how large the study network should be, and what analysis tools
need to be employed. Do you have facilities that are similar, where the
general issue decisions you made for the overall problem need to be
revisited and refined to address a more site-specific problem?
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