The braking force is placed in all design lanes which are considered to be loaded and which are carrying traffic headed in the same direction.

Nominal load per lane- the braking force for single vehicle stopping (FBS) shall be calculated as follows:

In accordance to AASHTO 3.6.4 is the greater of:

- 25% of the axle weights of the design truck/tandem or,

- 5% of the design truck/tandem plus lane load.

Height of application (h)

Define vertical distance from the superstructure surface,default 1.8 m.

Total line load

Calculated as (Nominal Load per Lane*Number of lanes *Multiple presence factor)/bridge length(with begin and end excess length).

Multiple presence factor

In accordance with AASHTO table 3.6.1.1.2-1 modify the vehicular live loads for the probability that vehicular live loads occur together in a fully loaded state.

Nominal Line load per lane

Calculated as Nominal Load per Lane/bridge length(with begin and end excess length).