Posted by Lonnie on Tuesday, January 30, 2001 at 3:32PM :
In Reply to: Road Salt posted by Jim Sullivan on Monday, January 29, 2001 at 8:45PM :
I did some nosing around on the Federal Department of Transportation web site and found the following tables. It was interesting to find that different states use different amounts of salt per lane/mile.
Also of interest is the table at the bottom showing total anual salt per lane/mile. It looks like the award goes to Massachusetts with 19.4 tons per lane/mile! For a three lane highway, thats almost 60 tons of salt per year!
Here tis
HIGHWAY DEICING
TABLE 2-1 OFFICIAL SALT USE POLICIES IN VARIOUS STATES
New England
Connecticut
Salt applied at 215 lb/lane-mi on multilane roads; no
more than 150 lb/lane-mi on two-lane state highways
Massachusetts
Salt applied at less than 300 lb/lane-mi on state
Highways
New Hampshire
Salt application guideline of 250 to 300 lb/lane-mi on
state highways
Middle Atlantic
Maryland
Salt application guideline of 300 to 500 lb/lane-mi on
state highways
West Virginia
Salt application guideline of 100 to 250 lb/lane-mi,
usually mixed with abrasives, except in cities
Great Lakes
Michigan
Salt applied at 225 lb/lane-mi on primary highways. Salt
and sand mixtures used on lower-priority roads,
depending on storm temperature and severity
Ohio
Salt applied at 200 to 300 lb/lane-mi on Interstate and
primary highways; 100 to 200 lb/lane-mi, with
abrasives on secondary roads; no more than 100 to
200 lb/lane-mi on low-priority roads
Wisconsin
Salt application rates of 100 to 300 lb/lane-mi
recommended; additional salt use restrictions related
to pavement temperature in place
Plains
Iowa
Salt applied at 150 lb/lane-mi (mixed with sand) on
Interstates and other arterials; 100 lb/lane-mi on
collectors; no salt used on local roads
Kansas
Salt applied at 100 to 250 lb/lane-mi (mixed with sand)
on Interstates, freeways, and other roads with
2,500+ ADT; less on roads with 750 to 2,500 ADT;
no salt used on roads with < 750 ADT
West
Colorado
California
Salt only with abrasives; rates not defined
Salt applied at 500 lb/lane-mi on some mountain
highways
NOTE: Although policies often identify an ideal salt application rate for equipment cali-
bration, they seldom regulate the timing and frequency of applications. Application timing
and frequency are typically determined by the maintenance engineer in charge during the
storm. Data in the table are from states that responded to relevant questions in survey.
ADT = average daily traffic.
SOURCE: TRB survey of state highway agencies.
TABLE 2-2 AVERAGE ANNUAL SALT LOADINGS
ON STATE HIGHWAYS WHERE SALT IS
NORMALLY APPLIED
Region and State Average Annual Loading
(tons/lane-mile)
New England
Maine 8.0
Massachusetts 19.4
New Hampshire 16.4
Vermont 17.1
Middle Atlantic
Delaware 9.0
Maryland 7.1
New Jersey 6.7
New York 16.6
Virginia 3.0
West Virginia 6.3
Great Lakes
Illinois 6.6
Indiana 9.0
Michigan 12.9
Ohio 9.1
Wisconsin 9.2
Plains
Iowa 3.8
Minnesota 5.0
Missouri 1.0
Nebraska 1.5
Oklahoma 1.5
South Dakota 1.0
Mountain and West
Alaska 1.2
California 3.0
Idaho 0.3
Nevada 1.9
New Mexico 0.5
NOTE: Data are from only those states that responded to relevant
, questions in survey.
SOURCE: TRB survey of state highway agencies.
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