Road hazards

thumb|upright=1.35|Light fog in Bangladesh

meteorological phenomenon common in arid and semi-arid regions

crossing in a river

thumb|The Red Lake (Croatia)|Red Lake sinkhole in [[Croatia]] A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet. A cenote is a type of sinkhole that exposes groundwater underneath. Sink and stream sink are more general terms for sites which drain surface water, possibly by infiltration into sediment or crumbled rock.

release of a liquid petroleum hydrocarbon into the environment, especially marine areas, due to human activity

rain, whose water is supercooled

place where a road crosses a railway at the same level

transparent coating of glazed ice on a surface

traffic calming device

trucking vehicle used to pull large amounts of cargo efficiently

thumb|A diagram of an aquaplaning tire thumb|Two vehicles aquaplaning through large puddles on the road's surface

thumb|Stone curbs and raised sidewalks on both sides of a 2000-year-old paved road in Pompeii, [[Italy]] thumb|upright|A curb with the street name on the sidewalk in New Orleans

rainwater harvesting infrastructure

durable surface material of a road

thumb|upright=1.35|Rockfall deposit, Afghanistan A rockfall or rock-fall is a quantity of rock that has fallen from a cliff face or from the roof or walls of mine or quarry workings.

acute curve (often one of a series) in a road, especially on a steep incline

construction detail designed to absorb temperature-induced volume changes of construction parts

storm characterized by a fall of freezing liquid precipitation

removable plate over manholes, to prevent things from falling into sewers and other tunnels

meterological phenomena

thumb|300px|Potholes occur with traffic over a roadway that has been weakened by water in the supporting soil structure. A pothole is a pot-shaped depression in a road surface, usually asphalt pavement, where traffic has removed broken pieces of the pavement. It is usually the result of water in the underlying soil structure and traffic passing over the affected area. Water first weakens the underlying soil; traffic then fatigues and breaks the poorly supported asphalt surface in the affected area. Continued traffic action ejects both asphalt and the underlying soil material to create a hole i

road safety feature

load that exceeds the standard or ordinary legal size and/or weight limits

minimum height and width of railway infrastructure

device or weapon used to impede or stop the movement of wheeled vehicles by puncturing their tires

thumb|In a crosswind landing, the fuselage of the plane may be skewed relative to the runway

thumb|The battered remains of a roadkilled White-tailed deer|deer on [[South Carolina Highway 170 by the Chechessee River in South Carolina, US]] thumb|Wide-ranging large carnivores like this [[bear are particularly vulnerable to becoming roadkill.]] Roadkill is a wild animal that has been killed by collision with motor vehicles. Wildlife-vehicle collisions (WVC) have increasingly been the topic of academic research to understand the causes, and how they can be mitigated.

sudden erosion (usually by water) of either natural terrain or man-made objects (such as roads and railroads)

low skid resistance due to insufficient road friction

road traffic accident involving many vehicles

thumb|Washboarding effect on a road Washboarding or corrugations is the formation of periodic, transverse ripples in the surface of gravel and dirt roads. Washboarding occurs in dry, granular road material with repeated traffic, traveling at speeds above . Washboarding creates an uncomfortable ride for the occupants of traversing vehicles and hazardous driving conditions for vehicles that travel too fast to maintain traction and control.

bus stop extending to traffic lane

asphalt road hazard