In the UK 'Ahead only' is indicated by lane markings and will either be an arrow painted on the road or you may see a sign that depicts all lanes, displaying arrows indicating where the traffic in each lane may travel.
Our one-way signs (used to indicate that traffic can only travel in one direction) look similar to american 'Ahead only' signs, as they are white arrows on a blue back ground.
Keep left/right arrows are also white arrows on blue backgrounds, but they point slightly towards the ground. These are used on traffic islands to make sure traffic passes on thecorrect side.
a school zone ahead
Warning sign of possible danger ahead
In railroad traffic, a green arrow means go ahead now.
The sign is a yellow diamond with a black +. The sign MAY also contain text such as Crossroad ahead.
Warning of deep furrow in road ahead
to warn of a possible danger ahead.
True
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]
A go ahead sign means that it is safe to proceed. A police office can stop traffic. When it's your time to go, the police office will wave his hand and give the go ahead to proceed.
The meaning of a traffic sign that says road construction ahead is that there are people up ahead working on a part of the road and to proceed with caution. The sign itself is triangular in shape, orange and has black lettering.
There is none. Running a stop sign is a volatiion of traffic regulations not of statutory law. They always exist and will appear on your traffic record. If you have a traffic ticket just go ahead and pay it.
Orange is the sign color reserved for construction signs, like "Work Ahead", "Slow", and "Bump". among many others.