Re: Interchange Justification Studies

On Jun 29, 2:12 pm, Larry G <gross.la...@xxxxxxxxx> wrote:
On Jun 29, 2:22 pm, Rick Powell <rkpow...@xxxxxxxxx> wrote:





On Jun 29, 11:41 am, Larry G <gross.la...@xxxxxxxxx> wrote:

Discussion at an MPO level of 3 potential interchanges and how FHWA
goes about evaluating them - and what effect such studies have on
available funding...

let me rephrase - 3 interchanges - no expectation of Fed/State funding
but developers involved in potentially funding one or more of them.

Is there a FHWA site that goes through rhyme and verse of how these
studies are done?

TAT

We have been through all kinds of scenarios at our District for Access
Justification reports, from strictly developer-driven to governmental
economic development-driven to system interchange-driven (as in a new
interstate-to-interstate connection).  In addition, an AJR is required
when an existing interchange is upgraded with a non-conventional
design such as a SPUI, which we have in the works at one location.
Expect about 40 pages of document and about 150-250 pages of
appendices unless there is a lot of complexity to the location.  If
you need a link to look at a sample AJR, there's a lot of them out
there on-line.  As far as doing an AJR to attract funding, it's a
necessary piece of the puzzle, but gets you maybe 5% of the way there,
in my experience.

Here's a link to one that was approved in our District.

http://planning.k3county.net/pdf/I-57%20AJR%20Final%20Report.pdf

RP

very good. thank you.

one more - how long does one of these critters normally take to do
and how long after they are done are they considered useful enough not
to have to do another one or an update?- Hide quoted text -

- Show quoted text -

IIRC, the I-57 and 6000 North AJR took 12 to 18 months from
authorization to completion, which also included a public hearing
process. Part of the time frame length was the fact it was a stand
alone study. We have done others in as little as 6-9 months if they
were part of a larger engineering study.

AJR's probably have reasonable shelf life if no additional studies are
done...it would be best to talk to your FHWA Division office to
confirm the estimated shelf life of a stand-alone AJR. There should
be an area Transportation Engineer at your state FHWA office who is
assigned to cover your MPO. A complete do-over would not likely be
required 10 years from now (assuming no major changes in the
conditions or the plan), but the information might need to be updated
such as traffic projections, level of service, weaving analysis, etc.

If a more detailed Preliminary Engineering study is initiated soon
after the AJR approval, you are probably good to go. About 3 years
lapsed between the AJR approval and our initiation of a Phase I
engineering study/Environmental Assessment for I-57 and 6000 North,
and no update was required. At least in our state, an Environmental
Assessment under NEPA guidelines is necessary prior to construction of
a new interchange if federal funds are- or will be- involved.

RP
.

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