Report on the 120 Bypass (Part 1 of 5)

Last week we held one of our regular 120 Bypass Corridor Planning Council (CPC) meetings of which I am the Chairman. Our consultants TranSystems are getting into the meat of the matter with traffic projections involving all the major scenarios.

NOTE: This is an elaborate post involving many 11 x 17 pdfs so I am going to space the posts out all this week, my recommendation is to download the pdf and print it out while you look at them because its much easier to compare the scenarios and make observations.

The first item of business is to examine todays (2005 numbers are the most recent) of what is called ADT (Average Daily Traffic) counts, these numbers are gathered by IDOT (Illinois Department of Transportation). The numbers you see are only the cars on the actual roadway so to when a road crosses the route you need to add both ADT's to determine the flow for that intersection.

Some more information, when a two lane road reaches 15,000 ADT it is considered seriously congested, numbers past 20,000 indicate saturation and you literally can't put that many more cars on the road, for example 120 between Alleghany and Hainesville Road is 22,900 ADT right now. That number will not go much higher because the road just can't handle any more. Same thing for a 4 lane road 30,000 is serious congestion and 35-40,000 is as high as you can go, existing roads like this in Lake County today are Grand Avenue in Gurnee which is at 51,700 in some places.

Here is the first map which is existing conditions in Lake County right now. You can see that starting from US Route 12 and running East the entire route 120 is over the seriously congested aspect, hence the need for the 120 bypass or improvements to existing 120! Some locations I want to look at repeatedly on these maps are as follows:

• Look at the number for 120 at 83, 17,700! With train tracks no less! We can all visualize the long backups almost to Hainesville road in the mornings and the reverse backup in the evenings.
• Interstate 94 has 113,000 ADT right now.
• Peterson Road has 9,400 ADT between 60 and Alleghany
• 60 has 14,200 just past Fremont Center.
• Fairfield has 10,500 at Gilmer.
• Washington has 15,800 at 83.

I have driven all these roads at various times and can visualize these numbers in terms of how long I waited to get through intersections as I am sure all of you can as well.

Now we get to the interesting stuff Scenario 1: No improvements to IL 120. CMAP (Chicago Metropolitan Agency for Planning) has done extensive studies of the traffic patterns in Chicagoland and the numbers are the ones that IDOT requires us to use to determine future need. They are based on what projected traffic would look like in 2030. 22 years from now. So Scenario 1 is if nothing changes, no improvements nothing!

One caveat on these scenarios, is that they have been adjusted to take in the planned road improvements over the next 22 years, so for example Peterson's eventual widening to 4 lanes is taken into account.

• Look at the number for 120 at 83 now, 17,700 in 2008 but in 2030 the number is 17,400 indicating that the stretch of road is as full as it can be right now. But look along 120 east and west of this intersection, congestion has built everywhere. Essentially the feel of traffic along the entire 120 roadway will be the same as the 120 and 83 intersection in 22 years.
  
• Interstate 94 has 113,000 ADT in 2008. The new number is 161,400 in 2030.
  
• Peterson Road has 9,400 ADT between 60 and Alleghany in 2008. With the widening the road is heavily congested at 25,500 ADT in 2030.
  
• 60 has 14,200 just past Fremont Center in 2008. Now the traffic flows onto Peterson and not down 60 because there is some nonsense off the map there as well towards Mundelien.
  
• Fairfield has 10,500 at Gilmer in 2008. The number here is 15,000 (serious congestion) in 2030.
  
• Washington has 15,800 at 83 in 2008. The number here is 19,100 in 2030.

What is happening is that 120 has reached saturation, and commuters are seeking other routes, loading up on Peterson, Washington and Rollins (24,300 to 35,400) to go East. Traffic is quite frankly a disaster everywhere in the county.