Introduction
This post looks at the allocation of highway capital dollars by the Illinois Department of Transportation throughout the State of Illinois, using factors such as population, highway miles, and daily vehicle miles traveled in each IDOT district. Likely to no one's surprise, it shows that District 1, which encompasses the six counties of northeastern Illinois, receives less than any other district on a vehicle miles traveled basis and is second lowest on a per capita basis, although it tops the State in terms of investment on a per highway mile basis. This analysis indicates that northeastern Illinois subsidizes highway capital investment in the rest of the State, a fact that may have some relevance in the ongoing debates over the "bailout" of the public transit agencies operating in District 1.
Methodology
The Illinois Department of Transportation has posted its FY 2008-2013 Proposed Highway Improvement Program (
here). Such detailed capital program documents were long shrouded in bureaucratic secrecy by IDOT. Governor Blagojevich's administration should get some credit for posting the Program in the public domain and, in general, making more information about IDOT and its programs publicly available.
The Program allocates capital dollars for highway improvements among each of IDOT's nine districts (district map
here). District 1 covers the same six counties in northeastern Illinois that make up the service area for the Regional Transportation Authority and its three service boards--Chicago Transit Authority, Metra, and Pace. The remaining districts are Downstate. Generally speaking, the higher the district number the further south the district.
I pulled highway miles, daily vehicle miles traveled, and FY 2008-2013 capital investment data from the Program. I aggregated 2000 Census data for each Illinois county into district population figures. Then, I utilized my primitive Excel skills and went to town.
Summary Results
Per Capita Highway InvestmentDistrict 1 $382.44District 2 $917.26
District 3 $1,649.3
District 4 $1,058.47
District 5 $600.11
District 6 $313.74
District 7 $1,011.16
District 8 $1,175.02
District 9 $1,425.75
Statewide Average $621.75
Downstate Average $935.20
Investment Per Highway MileDistrict 1 $918,623.88District 2 $387,403.45
District 3 $446,224.26
District 4 $350,153.85
District 5 $206,870.80
District 6 $147,072.82
District 7 $241,463.41
District 8 $466,703.66
District 9 $344,217.69
Statewide: $432,536.06
Downstate: $322,941.53
Investment Per Daily Mile TraveledDistrict 1 $26.96District 2 $52.16
District 3 $66.67
District 4 $60.53
District 5 $28.85
District 6 $29.71
District 7 $43.04
District 8 $54.26
District 9 $58.84
Statewide Average: $37.42
Downstate Average: $49.83
Analysis
This summary lends itself to two related conclusions. First, it appears from both the per capita and vehicle miles traveled data that the denser land-use patterns in District 1 lend themselves to more cost-effective highway transportation than in the less densely populated areas Downstate. This was a bit of surprise to me, given the higher land acquisition and construction costs in an urban area, but it makes sense when one considers the higher level of use of urban roadways.
Second, because of that higher level of cost-efficiency, IDOT is able to shift money from Northeastern Illinois to fund Downstate highway projects. District 1, after all, accounts for 63.52% of the population and 54.24% of the daily vehicle miles traveled in Illinois, yet it will receive only 39.07% of IDOT's highway capital dollars under the Program. Presumably, the percentage of vehicle miles traveled in a district approximates that district's contribution of gas taxes and other revenues for IDOT's highway program. The major difference between District 1's revenue contribution and its return in the form of IDOT highway capital investment is highly significant.
Some caveats. First, this analysis does not consider IDOT's investment in other transportation modes such as airports and public transit. When IDOT's investments in those other modes are factored in--something I hope to do down the line--District 1 may not be such a heavy donor region after all. Second, the Illinois Tollway system, which is centered in District 1 and is completely funded by user fees--frees up District 1 money for use Downstate. It is quite possible that these two effects cancel each other, leaving District 1 as a major donor region.
Third, it is possible that the distribution of IDOT's capital investment reflects a certain ebb and flow among the districts. Maybe the 2008-13 period is a down period for District 1 and that it might even become a donee district at some point in the future when it finally undertakes expensive new projects like the
Western O'Hare Bypass. Finally, this analysis does not consider the value of the products being carried on the highway in each district. It is possible, although I don't think it is likely, that the value of goods carried on Downstate highways is higher than the value of goods carried on District 1 highways.
The purpose of this analysis is not to incite more Chicago vs. Downstate antagonism. Every great urban region, after all, needs to be linked effectively to its hinterland. The notion that "Chicago" is soaking up a disproportionate share of the State's transportation dollars, however, appears to be a myth.
Detailed Results
District 1 Population 7,261,176 63.52%
Highway Miles 3,023 18.40%
Daily Vehicle Miles 103,000,000 54.24%
FY 2008-13 Investment $2,777,000,000 39.07%
Per Capita Investment $382.44
Per Mile Investment $918,623.88
Per VMT Investment $26.96
District 2 Population 710,814 6.22%
Highway Miles 1,683 10.24%
Daily Vehicle Miles 12,500,000 6.58%
FY 2008-13 Investment $652,000,000 9.17%
Per Capita Investment $917.26
Per Mile Investment $387,403.45
Per VMT Investment $52.16
District 3 Population 472,901 4.14%
Highway Miles 1,748 10.64%
Daily Vehicle Miles 11,700,000 6.16%
FY 2008-13 Investment $780,000,000 10.98%
Per Capita Investment $1,649.39
Per Mile Investment $446,224.26
Per VMT Investment $66.67
District 4 Population 537,568 4.70%
Highway Miles 1,625 9.89%
Daily Vehicle Miles 9,400,000 4.95%
FY 2008-13 Investment $569,000,000 8.01%
Per Capita Investment $1,058.47
Per Mile Investment $350,153.85
Per VMT Investment $60.53
District 5 Population 461,585 4.04%
Highway Miles 1,339 8.15%
Daily Vehicle Miles 9,600,000 5.06%
FY 2008-13 Investment $277,000,000 3.90%
Per Capita Investment $600.11
Per Mile Investment $206,870.80
Per VMT Investment $28.85
District 6 Population 984,879 8.62%
Highway Miles 2,101 12.79%
Daily Vehicle Miles 10,400,000 5.48%
FY 2008-13 Investment $309,000,000 4.35%
Per Capita Investment $313.74
Per Mile Investment $147,072.82
Per VMT Investment $29.71
District 7 Population 391,631 3.43%
Highway Miles 1,640 9.98%
Daily Vehicle Miles 9,200,000 4.84%
FY 2008-13 Investment $396,000,000 5.57%
Per Capita Investment $1,011.16
Per Mile Investment $241,463.41
Per VMT Investment $43.04
District 8 Population 715,734 6.26%
Highway Miles 1,802 10.97%
Daily Vehicle Miles 15,500,000 8.16%
FY 2008-13 Investment $841,000,000 11.83%
Per Capita Investment $1,175.02
Per Mile Investment $466,703.66
Per VMT Investment $54.26
District 9 Population 354,901 3.10%
Highway Miles 1,470 8.95%
Daily Vehicle Miles 8,600,000 4.53%
FY 2008-13 Investment $506,000,000 7.12%
Per Capita Investment $1,425.75
Per Mile Investment $344,217.69
Per VMT Investment $58.84