In
recent
years
,
thousands
of
roundabouts
have
been
built
____________________
.
They
have
become
very
____________________
and
this
is
due
to
the
fact
that
roundabouts
are
____________________
.
Accidents
decrease
because
traffic
can
only
travel
in
____________________
direction
so
the
most
____________________
kind
of
crash
,
the
head
-
on
collision
is
eliminated
.
In
addition
,
because
of
the
sharp
curves
,
drivers
are
forced
to
____________________
down
in
roundabouts
.
Besides
being
safe
,
roundabout
reduce
____________________
since
carbon
emissions
are
____________________
when
the
cars
keep
moving
than
when
thery
are
stuck
waiting
at
a
____________________
light
.
In
short
,
roundabouts
are
a
____________________
idea
.
