14 , 2005
Warns of Black Ice
- The Minnesota Departments of Transportation is warning drivers
of black ice.
ice can be one of the most dangerous conditions on winter roads,"
said District Engineer Jim Swanson. "It is almost invisible
and can catch drivers off guard," he added. Black ice is
clear and appears black because the dark asphalt surface underneath
shows through. It can form on heavily congested highways from
auto emissions, but other roads are susceptible including those
in shaded areas, near lakes and rivers, in tunnels and on overpasses.
increase safety by observing the following tips:
aware that black ice is almost invisible.
especially careful on bridges, overpasses and tunnels and in
early morning when the air temperature is rising faster than
the pavement temperature.
brake while driving on ice. Applying pressure to your brakes
while on ice will cause a vehicle to skid. Brake only during
your distance. The distance needed to stop on ice is twice as
long as under normal driving circumstances. Keep at least a
three-car distance from the vehicle directly in front of you.
forms when the air temperature is warmer than pavement, which
causes moisture to rapidly freeze and create a thin, transparent
layer of ice on the roadway.
It can be
neutralized with salting and sanding. However, drivers should
be aware that salt loses its effectiveness at about 15 degrees
including incident reports, is available by calling 511 or logging
on to www.511mn.org. Know the
Road. Dialup or log on.
Work Zones. Pay Attention or Pay the Price.
Rebecca L. Arndt
Public Affairs Coordinator
Mn/DOT District 7
501 S. Victory Dr.
Mankato, MN 56001