...
Lanes
...
are
...
available
...
through
...
the
...
...
...
to
...
indicate
...
where
...
vehicle
...
loads
...
act
...
on
...
a
...
bridge
...
superstructure.
...
Lanes
...
are
...
defined
...
by
...
reference
...
lines,
...
which
...
may
...
be
...
layout
...
lines
...
or
...
...
-object
...
paths.
...
Versatile
...
features
...
enable
...
the
...
modeling
...
of
...
complex
...
roadways
...
and
...
traffic
...
patterns.
...
Multiple
...
lanes
...
may
...
be
...
created,
...
straight
...
or
...
curved,
...
each
...
of
...
a
...
specific
...
length
...
and
...
width,
...
and
...
need
...
not
...
be
...
parallel.
...
Users
...
may
...
combine
...
vehicle
...
loads
...
with
...
static
...
and
...
dynamic
...
loads,
...
then
...
envelope
...
parameters
...
for
...
maximum
...
and
...
minimum
...
response.
...
Response
...
quantities
...
may
...
then
...
be
...
presented
...
in
...
a
...
useful
...
manner
...
according
...
to
...
lane
...
geometry.
...
Vehicle
...
live
...
loads
...
may
...
be
...
created
...
manually
...
or
...
selected
...
from
...
a
...
list
...
of
...
standard
...
specifications.
...
...
...
may
...
then
...
be
...
selected
...
as
...
the
...
...
...
which
...
implements
...
one
...
of
...
the
...
following
...
methods:
- Influence-based
...
- enveloping
...
- analysis
...
- ,
...
- in
...
- which
...
- vehicles,
...
- oriented
...
- in
...
- either
...
- direction,
...
- are
...
- automatically
...
- positioned
...
- within
...
- each
...
- lane
...
- to
...
- induce
...
- maximum
...
- and
...
- minimum
...
- response
...
- throughout
...
- the
...
- structure.
...
- Step-by-step
...
- analysis
...
- ,
...
- in
...
- which
...
- vehicles
...
- travel
...
- along
...
- the
...
- roadway,
...
- each
...
- with
...
- its
...
- own
...
- start
...
- time
...
- and
...
- position,
...
- direction,
...
- and
...
- speed.
...
- This
...
- step-by-step
...
- procedure
...
- may
...
- couple
...
- with
...
...
- analysis
...
- and
...
...
- behavior,
...
- and
...
- may
...
- be
...
- useful
...
- for
...
- special
...
- studies
...
- or
...
- unusual
...
- permit
...
- vehicles.
...
Additional
...
information
...
is
...
available
...
in
...
the
...
...
...
...
(Lanes,
...
page
...
436).
...
Tips
- As described in the Lane-to-object
...
...
- article,
...
- users
...
- may
...
- control
...
- which
...
- superstructure
...
- objects
...
- are
...
- subjected
...
- to
...
- lane
...
- loading.
...
See Also
- Layout line article
- Influence-based moving-load analysis implementation article
- Moving-load analysis section