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Dennis O'Shea

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  1. 2 votes

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    Dennis O'Shea commented  · 

    We are not aware of WIM based systems used for load enforcement for load posted bridges. Load posted bridges may not be located where WIM systems are installed. The system should be able to be used in remote areas.
    Many small municipalities have limited budgets but if the cost of a system could offset the cost for maintenance or replacement of the bridge, the cost could be justified. Each bridge owner may have a different idea of low cost. So an economical solution may be an asset for more owners.

  2. 2 votes

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    Dennis O'Shea commented  · 

    The bridge owner may have a load rating in many cases. But a load posting may not be available in some cases for bridges without plans

  3. 2 votes

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    Dennis O'Shea commented  · 

    Accuracy should be to the nearest ton to be able to be used for truck weight enforcement. Bridge postings often last for many years as they are in place to extend the life of the bridge.
    The system should be such to be protected against environmental effects as well as vandalism.
    Suggested service life should be a minimum of 5 years but preferable longer for the life of the posting restriction exists on the bridge until strengthening or replacement of the bridge is needed. Propose a service life which is achievable.

  4. 3 votes

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    Dennis O'Shea supported this idea  · 
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    Dennis O'Shea commented  · 

    Usable format means in a report format which will indicate whether the load posting weight is exceeded. The report should indicate that the weight limit was exceeded as well as the amount over the limit. It could be pounds or tons.
    Yes the system at a minimum should identify whether the truck is overweight.
    Stable data transmission should be determined. Cellular would seem to work in many cases but bridges are in remote areas which may not have adequate cellular coverage.

  5. 1 vote

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    Dennis O'Shea commented  · 

    Speed limit ranges may vary as bridges could be located on high speed as well as low speed roads.
    Lowering the speed limit will be up to the speed enforcement authorities but it could be suggested as part of the proposed system, although the system should work at any speed, otherwise its use would be limited and not marketable. Pavement type would likely be AC as that is the predominant type but the system should be proposed to be used anywhere a bridge is posted which could have PCC approaches.
    If PCC pavement is required for the system to work, permission to install PCC pavement will need to be worked out with the facility owner. The marketed system package presented/implemented could include installing PCC pavement on the approach with the installation.

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