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#GIFSICLE GRUNT LESS DOWNLOAD#

I'll analyze some summer traffic later to see if any changes occur then.

The conclusions I have drawn above strictly apply only to the period that I analyzed, 24 January to 25 February 1997.

When 30% of all 1,383 sensors indicate slow traffic, 100% of the sensors in many areas of L.A.

See 210 East Freeway from Hill to Sunflower for two examples of variability caused presumably by accidents, one on Wednesday noon and one on Monday 11 p.m. That is what makes Maxwell's website very valuable.

traffic congestion pattern is quite repeatable, the actual current traffic on any individual freeway is much more variable.

The Saturday with rain had significantly more congestion than the other Saturdays and Sundays that I examined.

In contrast, the Monday afternoon rush hour congestion is always the lowest of the week.

(There is some weak evidence that the Friday morning commute is a bit lighter than the other days.) Fridays are by far the worst traffic day for the evening commute of the weekdays, directly contradicting the "Friday Light" claims made by some.5-10% of all sensors indicate bad congestion at all times of all days, except Sundays and possibly between midnight and 6 a.m.county indicate bad congestion during the morning rush hour and the afternoon rush hour from Tuesday through Friday! traffic congestion pattern is almost like clockwork, following the same pattern day after day. traffic, I used all sensors on all freeways. Maxwell's website color-codes the current state of each sensor as follows:įor these initial calculations, I have defined bad congestion by a sensor that is red, yellow or blue, and then calculated the percentage of such sensors at any given time, subtracting those with sensor errors from the total possible number of sensors. There are 1,383 sensors embedded in the freeways and reported on Maxwell's website. Also, my sampling of the morning commute is not terribly complete, since I am not a morning person and had to make a special effort to get any samples at all before 9 or 10 a.m. Of those days, the weather was good and conditions "normal" except for rain on Saturday, 25 January and rain on Superbowl Sunday, 26 January. "click here for the SmarTraveler real-time traffic map", the second linkįrom the upper left, which is a "blinking" link.) Traffic Report page has since moved to SmarTraveler.

#GIFSICLE GRUNT LESS DOWNLOAD#

Even though it is probably easy to write a script to automatically download such data, I did it manually, since it is relatively easy to do this without much effort. County for 19 days from 24 January to 25 February 1997.

I used their service to download Current Congestion Locations in L.A. Maxwell made available the Los Angeles Traffic Report. I've wondered about them ever since I moved to Pasadena, and now, thanks to the wonderful service provided by Caltrans and Maxwell Technologies, I have been able to find out. These are questions of more than academic interest to many people. What is the penalty in time to drive the freeways at the worst times?.How should I plan my travel to give me the best chance of not encountering traffic delays?.When are the worst times to drive on Los Angeles freeways?.Plots of the percentage of sensors indicating congestion versus time of day, by freeway Freeway Traffic Versus Time and Day of Week Freewat Traffic Versus Time and Day of Week Average L.A.