Daylight Savings Time and DOT Logbook

A few years ago I drove Nearly 12 hours in the fall on DLST, and my log logged 11, I didn't even flag the 2 AM hour, *(I drive at Night when ever poss.), That week when my log was checked at a scale, the officer took notice and left it alone, He did ask me how I was going to log it in the Spring, I told him that I'll drive my 11 and be sleeping at 2 AM that day. thus..... One hour less sleep. He stated that I would have a 50/50 chance of a DOT giving me a fit for not having 10 hours off.... but most likely no Citation.. That was just One Officers view point.... I am sure there are a million other views on the same subject....

 

Earth's rotation period relative to the Sun (true noon to true noon) is its true solar day or apparent solar day. It depends on the Earth's orbital motion and is thus affected by changes in the eccentricity and inclination of Earth's orbit. Both vary over thousands of years[1] so the annual variation of the true solar day also varies. Generally, it is longer than the mean solar day during two periods of the year and shorter during another two.[n 1] The true solar day tends to be longer near perihelion when the Sun apparently moves along the ecliptic through a greater angle than usual, taking about 10 seconds longer to do so. Conversely, it is about 10 seconds shorter near aphelion. It is about 20 seconds longer near a solstice when the projection of the Sun's apparent movement along the ecliptic onto the celestial equator causes the Sun to move through a greater angle than usual. Conversely, near an equinox the projection onto the equator is shorter by about 20 seconds. Currently, the perihelion and solstice effects combine to lengthen the true solar day near December 22 by 30 mean solar seconds, but the solstice effect is partially cancelled by the aphelion effect near June 19 when it is only 13 seconds longer. The effects of the equinoxes shorten it near March 26 and September 16 by 18 seconds and 21 seconds, respectively

http://en.wikipedia.org/wiki/Earth's_rotation

 

Its not as complicated as it appears, the time you start your 11,14 dictates how long you can operate your CMV according to FMCSA rules regarding H.O.S. The consequences for running over are at the descretion of the Safety Man or DOT Man (when audited). For the Drivers of Solar Powered Trucks, this is not an issue. When the Sun appears in the morning of a DST change the clock will have been reset andd they can log on-duty.

 

If a day depended on the earths orbit around the sun, then a day would be 8760+ hours long.

 

I was hoping you would understand that the reason the earth day and rotation is based on the its relation to the sun. maybe this will help?

Mars has an axial tilt and a rotation period similar to those of Earth. Thus it experiences seasons of spring, summer, autumn and winter much like Earth, and its day is about the same length. Its year, however, is almost twice as long as Earth's, and its orbital eccentricity is considerably larger, which means among other things that the lengths of various Martian seasons differ considerably, and sundial time can diverge from clock time much more than on Earth.

The average length of a Martian sidereal day is 24h 37m 22.663s (based on SI units), and the length of its solar day (often called a sol) is 88,775.24409 seconds or 24h 39m 35.24409s. The corresponding values for Earth are 23h 56m 04.2s and 24h 00m 00.002s, respectively. This yields a conversion factor of 1.027491 days/sol. Thus Mars's solar day is only about 2.7% longer than Earth's.

The rotation of venus is clockwise (earths -counterclockwise) 1 day on venus last 243 Earth days. one orbit takes 224 earth days.

Mercury is orbiting the Sun once every 88 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits.

Astrophysics is based on Aristarchus of Samos (c. 310-250 BC) first put forward the notion that the motions of the celestial bodies could be explained by assuming that the Earth and all the other planets in the Solar System orbited the Sun. Unfortunately, in the geocentric world of the time, Aristarchus' heliocentric theory was deemed outlandish and heretical.

for more info on the history of astrophysics

http://en.wikipedia.org/wiki/Timeline_of_gravitational_physics_and_relativity

 

Not really. Human psychology dictates DST. Noon is always the moment the sun reaches its zenith wherever you are standing.

 

This is a follow-up to the E-log Debate


Location: Planet Earth Monday 11/07/2011 by popmartian

On 11/06/2011 the MCP 200 Qualcomm HOS Graph shows OFF = 25:00 (line 4) It is noted with a dark blue mark between 01:00 and 02:00 on a graph that starts a 0 and ends at 24.

What does this mean? There were twenty-five hours on Sunday 11/6/2011 there will be 23 hours on Sunday March 11, 2012.

Why the confussion? Benjamin Franklin is credited with the concept of Daylight Saving Time. The basic idea is to make the best use of daylight hours by shifting the clock forward in the Spring and backward in the Fall. Daylight Saving Time has been in use throughout much of the United States, Canada and Europe since World War I. In 1966, President Lyndon Johnson signed an act into law whereby Daylight Saving Time begins on the last Sunday of April and ends on the last Sunday of October each year. However, any State can opt out of Daylight Saving Time by passing a State law.
Hawaii does not observe Daylight Saving Time and neither does Arizona (although the Navajo Nation, in northeastern Arizona, does). For many years, most of Indiana did not observe Daylight Saving Time with the exception of 10 counties. Beginning in 2006, all of Indiana now observes Daylight Saving Time. However, the state remains divided in two time zones. Seventy-four counties (including state capital Indianapolis) are in the Eastern Time Zone. The 18 remaining counties are in the Central Time Zone (see: Indiana Time Zones).
US Federal law was amended in 1986 to begin Daylight Saving Time on the first Sunday in April:
Daylight Saving Time begins at 2 a.m. on the first Sunday of April
Daylight Saving Time ends at 2 a.m. on the last Sunday of October
In 2005, President Bush signed into law a new energy policy bill that would extend Daylight Saving Time by 4 weeks beginning in 2007:
Beginning in 2007:
Daylight Saving Time begins at 2 a.m. on the second Sunday of March
Daylight Saving Time ends at 2 a.m. on the first Sunday of November

So the answer to the original post is DRAW two lines on Paper Logs at appropiate duty status during the hour between 1 am and 2 am note at the end of the day the total hours need to be adjusted by +/- 1 hours (23 or 25) and flag DST time change. This should keep it Legal. As far as DOT, the hours of service 14,11 should not be effected.

I have to retract my earlier statement that there are only 24 hours in a day no matter how you slice it or dice it. becasue of DST we actually do have to note the difference.

A thousand pardons to the members of the truckers report forum for the inaccurate post.

 

So if i understand correctly you do not have to take an extra hour on your 10 hour break in the spring to accomodate the loss of one hour?

 

our company told us to make sure were off for 10 actual hours. Our logs(elogs) will show an 11 hr break which is actually ten.
Think the regs state 10 consecutive hours.

 

I would suggest going by the actual hours of drivng or break.What I mean is say you start at Midnight be done by Noon or 10 am depending on which time change your dealing with. The same goes for taking your 10 hour break. Take the full 10 hours. Be sure to flag the time change and this will reduce the chances of some overzealous or P/Oed DOT officer of finding a reason to give you a logbook violation.