My DOT post of 16 Sep 2005 favoring Central Time for Indiana

Title: Time Zone Boundaries in the State of Indiana
Docket: OST-2005-22114-391

To: Joanne Petrie
via "http://dms.dot.gov/submit/"
Office of the General Counsel (C-50)
400 7TH ST SW
WASHINGTON DC 20590-0001

PETITION FAVORING CENTRAL TIME (supplement)
===========================================
I think it is helpful to make one final wrap-up of what I see as the pros and cons of Central time versus Eastern time.

The baseline to which I mentally compare our two alternative time zones is Indianapolis local mean time (LMT).

There is a pretty good definition of LMT at "http://en.wikipedia.org/wiki/Local_mean_time". This page defines LMT in part as follows. "Local mean time was used from the early nineteenth century... until standard time was adopted..."

In other words LMT is the time Indianapolis would have observed before the the U.S. Standard Time Act first established the four continental U.S. standard time zones in 1918. LMT is similar to apparent local time, but corrected for the inherent 15-minute-per-year or so variation of the sun's east-to-west position in the sky.

With LMT and without any daylight time, the earliest sunrise of the year in Indianapolis would be 4:32 am about June 14. The latest sunrise would be 7:22 am about January 5. The earliest sunset would be 4:35 pm about December 7 and the latest sunset would be 7:32 pm about June 28. These are the baselines against which we compare the shift in time by observing Central or Eastern standard time.

I perceive that the major benefit of Daylight Saving Time (DST) to Indiana commerce is not due to the specific time zone into which the DOT decides to put Indiana, but is primarily due to nearly all of Indiana being on a single time, and everyone else in the U.S. who observes DST always knowing exactly how many hours different their time is from any particular city in Indiana. If the DOT ends up putting all, or nearly all, of Indiana in a single zone, this would obviously make it even easier for anyone in the U.S. to know the time almost anywhere in Indiana any day of the year.

With about 394 miles of Indiana bordering the Central time portions of Illinois and Kentucky and about 393 miles bordering the Eastern time portions of Michigan, Ohio, and Kentucky, there are going to be approximately as many people having to adjust to having neighbors across the state line on a different time whether Indiana is on Central or Eastern, so I don't think that is a significant factor favoring either time zone.

I believe that so many Hoosiers feel so strongly about the time because with our particular north-south latitude we have such a wide variation in the amount of sunlight over the course of a year. At the summer solstice (about June 21), the longest day is about 14.99 hours in Indianapolis. At the winter solstice (about December 22), the shortest day is only 9.35 hours. This is about 5½ more hours of daylight to figure out how to distribute most conveniently in June compared to December, when we start being concerned about people getting safely to their destinations in the morning or evening darkness or dusk.

Although couched in the preferred DOT criteria of "convenience of commerce", I believe that a lot of the passion on the issue, particularly away from the border counties of the state, mainly comes down to the following individual preference.

The Eastern proponents prefer to have the latest sunset (nominally 7:32 pm) extended 103 minutes later than LMT to 9:15 pm and prefer to have the earliest sunset in December no earlier than 5:20 pm. They value these later sunset times enough to tolerate having the sunrise extended those same 103 minutes to as late as 8:15 am just before we go back to standard time for the winter in early November (starting 2007).

On the other hand, I believe most Central proponents value either a not quite so late winter morning sunrise, a not quite so late summer sunset, or both, and therefore prefer a more modest 43-minute extension of the latest sunset (compared to LMT) from 7:32 pm to 8:15pm (as we have had with year-round EST / CDT since the 1960's). To achieve this, they are willing to tolerate sunsets as early as 4:20 pm in December (15 minutes earlier than we would have with LMT).

As I mentioned in a previous comment, this is virtually the same amount of additional sunlight that several other parts of the country are seemingly content to achieve with Daylight Saving Time, including a number of other major U.S. cities such as Spokane WA, Las Vegas NV, Nashville TN, Montgomery AL, and Boston MA.

In my opinion, neither side is objectively right or wrong. It just comes down to individual preference and would perhaps therefore best be decided eventually by some sort of statewide referendum.

It appears to me that collective individual preference should have greater weight than the collective voice of the business owners and executives. The reason I say this is that regardless of which time zone the state ends up in (and I hope that it does end up predominantly in a single zone), individual business owners and executives are still free to operate and manager their businesses on whichever schedule provides them the greatest competitive advantage, as they always have been.

They don't need to be in a particular time zone to ask an employee to work whatever shift is needed for best communication with business associates in other time zones. It is already common practice for U.S. businesses to ask employees to plan their workday or work week around a very early or very late conference call with a business several time zones away.

I hope that helps to bring the emotions on this issue into a little better perspective.

Sincerely, Bill Starr
Fri, 16 Sep 2005, 11:49pm EST / CDT

My DOT post of 16 Sep 2005 favoring Central Time for Indiana