- What is the purpose of the system?
- What degree of accuracy is required?
a. Gross Vehicle weight?
b. Wheel Load?
c. Axle Load?
d. Axle Group Load?
e. Speed?
f. Axle Spacing?
- What is the estimated speed of the vehicles to be weighed?
- Should the scale be capable of weighing left and right side weights?
- Where will the system/electronics be located?
- How far are power/phone drops?
- Will the WIM system need to interface to a static scale or AVI system?
- Will vehicle classification be required?
- What is the temperature range typically seen at the site?
- What are the typical weather patterns/occurrences?
- What are the approach to and departure from the scales like?
a. Road surface condition?
b. Road material?
c. Road thickness?
d. Slope (latitudinal and longitudinal)?
e. Road smoothness?
f. Road curvature?
g. Area around site?
h. Rutting and cracking?
i. Off-ramps/on-ramps?
j. What is traffic flow like?
k. How much traffic will the site see?
l. If in a weigh station, what is the ramp length?
- What kind of data output is required?
- What type of communications are required?
- What will the operator interface be?
- What kind and how much data needs to be stored?
- Will a traffic sorting system by required?
- Are there any special features or functions required?
- How much experience do you have with WIM?
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