Bridges freeze faster than roadways on land. Bridges also have more "black ice"-- ice you cannot SEE but is there. A sign "Ice on Bridge" means they know there is potential for bridges to have ice and that this bridge is prone to icing. It means SLOW DOWN; be prepared. It means to be cautious on a 2-lane 1-direction highway if you try to pass on a bridge--stay in your lane until you are off the bridge unless your vehicle is an obstacle to traffic flow or it is too unsafe for you to pull to the right lane.
A Narrow Bridge sign means that the bridge ahead is only wide enough to accommodate two lanes of traffic with very little room [source: A_Narrow_Bridge_sign_means_that_the_bridge_ahead_is_only_wide_enough_to_accommodate_two_lanes_of_traffic_with_very_little_room]
Watch for highway machinery Watch for cross traffic and traffic turning onto or off of the highway.
A yield sign.
(Answer) Some roads are closed due to like thru traffic, flooding, bridge is out, or a accident happened.
No sign, just common sense.
railroad
Yeld
True
A yellow traffic sign typically indicates a warning or caution for drivers to be alert and proceed with caution.
Tourist information
The sign is a yellow diamond with a black +. The sign MAY also contain text such as Crossroad ahead.
A oneway roadway with traffic coming agaisnt you