Urban Transportation and Logistics

153Road Safety

value is M*, then the evaluation function can be given by the following

with the measurement time t

1

to T (increment is t

k

):

∑

{}

() ()

=−

=

JMtMt*

kk

k

T

2

1

(6.8)

Then, each axle P

i

can be obtained by minimizing the preceding evalu-

ation function.

In the past, research based on the preceding theory, the number of

axles, and the wheel base was obtained by optical switch. The other sys-

tem based on the response of main girders also uses that of concrete slab

for axle recognition and wheel base estimation (Tamakoshi etal. 2004).

In this system, total weight of the vehicle is estimated by the response

of the main girder, and the axles are a ...