Inside Weigh-In-Motion
[ I-95 S Type 11 ] [ I-95 N Type 11 ] [ Bethel E Overweight Type 10 ] [ Bethel W Overweight Type 10 ] [ Bethel E Percentage Overweight Type 10 ] [ Truck Speed ] [ Truck Speed Percentage ]

JOHO Weigh-In-Motion (WIM) Images

Because the truck traffic is the most critical source of road wear, understanding the truck traffic is crucial to the understanding of road design and maintenance.

The Maine Department of Transportation has recently installed 12 weigh-in-motion (WIM) sensors at various strategic places around the state. JOHO updates a series images for internal use with a single script that the analyst runs each time he downloads the counts from the sensors.

MDOT uses JOHO images like these to monitor the operation of the sensors.  Loss of a sensor or a lane is immediately obvious when a JOHO image is updated.

The Kittery images show the asymmetric patterns of truck traffic on I-95.  The Bethel images show the pattern of overweight trucks in northeast Maine near a lumber mill. We’ve included an image of the percentage of overweight trucks to illustrate JOHO’s capability to compute new images from images of the standard sensor output.

As an illustration of JOHO’s flexibility we’ve included speed images that use a different layout that shows truck speed at different hours of the day for different months. The first speed image counts trucks at a given speed, while the second gives the percentage of trucks at that speed.  

  I-95 S Type 11

  Bethel E Overweight Type 10

  Bethel E Percentage Overweight Type 10

  Truck Speed