Correct,  it became optional and several states continued on as long as they 
could.

Howard

From: USMA <[email protected]> On Behalf Of Phil Chernack
Sent: Wednesday, June 10, 2020 2:55 PM
To: U.S. Metric Association <[email protected]>
Subject: [USMA 1459] Re: State Higway metric rollback


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The law that required metric plans to be submitted to the FHWA was ISTEA ( 
Intermodal Surface Transportation Efficiency Act of 1991) passed in 1991.  
While it required metric plans, it prohibited federal money to be used for 
metric signage.  After AASHTO (American Association of State Highway 
Transportation Officials) promulgated metric plans and many states converted to 
metric by 2000, they were receiving complaints from contractors that while the 
state level was metric, the county and local level as well as private 
construction was not.  When the next transportation funding bill was passed 
(TEA-21, Transportation Equity Act for the 21st Century) it removed the metric 
plan requirement.

Phil Chernack

On Wed, Jun 10, 2020 at 9:28 AM Mark Henschel 
<[email protected]<mailto:[email protected]>> wrote:
I remember going to a conference of Federal highway officials back around 20 or 
30 years ago. All of the discussion was about standards and sizes. How wide 
will the roads be and how big will the interchanges be? Somehow somebody got 
upset they would have to see those signs in kilometers, even though none of the 
discussion was about signs.
When the legislation went through in the highway bill, it prohibited ALL 
federal money for metric related activities. I'm sure they were mainly afraid 
of kilometer signs, but the legislation effectively stopped all federal money 
for all metric related activities. Thus states, such as Minnesota, which was 
fairly well along in the metric standards transition, had to roll back ALL 
metric work, there being no federal reimbursement money available to pay for 
any of their metric activity.

Mark Henschel

On Wed, Jun 10, 2020 at 7:17 AM Michael Payne 
<[email protected]<mailto:[email protected]>> wrote:
I distinctly remember reading somewhere, probably on this list serve how 
someone in Congress slipped something into a budget bill (?) that upended the 
whole transition, and if memory serves, I think more than 40 states had already 
transitioned to doing all Federal Highway construction and planning in SI. I’m 
sure this was in the late 90’s early 2000’s. It cost money to transition and 
money to transition back. What a waste.

Someone will read this and remember. Unless I have it all wrong?

Mike Payne



On 10 Jun 2020, at 13:03, Mark Henschel 
<[email protected]<mailto:[email protected]>> wrote:

Federal legislation in the Highway bill prohibited federal money being used to 
pay for Metric System items such as highway signs. Since there was no money to 
pay for it, all metrication work on highways stopped. Ironically states were 
not asking for money for signs, but for actual construction using SI units
 This was back in the Reagan era, and no changes have been made since.

On Tue, Jun 9, 2020, 11:45 PM Michael Payne 
<[email protected]<mailto:[email protected]>> wrote:
Anyone have the history of how and why most State Highway departments rolled 
back their metric transition a number of years back? I seem to remember it was 
some Congressmen who inserted language into a budget somewhere that made the 
whole transition voluntary. And it all unravelled.

Mike Payne
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