Following the deaths of 7 people in a crash on the M5 in 2011, Justin Rowlatt and Anita Rani take to Britain's roads to discover why fatalities on them are rising after years of declining numbers.
Runtime: 60 minutes
How Safe are Britain's Roads? - Road - Netflix
A road is a thoroughfare, route, or way on land between two places that has been paved or otherwise improved to allow travel by foot or some form of conveyance, including a motor vehicle, cart, bicycle, or horse. Roads consist of one or two roadways (British English: carriageways), each with one or more lanes and any associated sidewalks (British English: pavement) and road verges. There is often a bike path. Other names for roads include parkways, avenues, freeways, tollways, interstates, highways, or primary, secondary, and tertiary local roads.
How Safe are Britain's Roads? - Road terminology - Netflix
Bollard Rigid posts that can be arranged in a line to close a road or path to vehicles above a certain width Byway Highway over which the public have a right to travel for vehicular and other kinds of traffic, but is used mainly as a footpath or bridleway Bypass Road that avoids or “bypasses” a built-up area, town, or village Bottleneck Section of a road with a carrying capacity substantially below that of other sections of the same road Botts' dots Non-reflective raised pavement marker used on roads Camber (or crown) the slope of the road surface downwards away from the centre of the road, so that surface water can flow freely to the edge of the carriageway, or on bends angling of the surface to lean traffic 'into the bend' reducing the chance of a skid. Cant Another name for cross slope or camber Carriageway Part of the road intended for the movement of road motor vehicles; the parts of the road which form a shoulder for the lower or upper layers of the road surface are not part of the roadway, nor are those parts of the road intended for the circulation of road vehicles which are not self-propelled or for the parking of vehicles. Cat's eye reflective raised pavement marker used on roads Chicane Sequence of tight serpentine curves (usually an S-shape curve or a bus stop) Chipseal Road surface composed of a thin layer of crushed stone 'chips' and asphalt emulsion. It seals the surface and protects it from weather, but provides no structural strength. It is cheaper than asphalt concrete or concrete. In the United States it is usually only used on low volume rural roads Corniche Road on the side of a cliff or mountain, with the ground rising on one side and falling away on the other Cross slope The slope of the pavement, expressed as units of rise per unit of run, or as a percentage Curb (kerb) A raised edge at the side of the roadway. Curb extension (also kerb extension, bulb-out, nib, elephant ear, curb bulge and blister) Traffic calming measure, intended to slow the speed of traffic and increase driver awareness, particularly in built-up and residential neighborhoods. Cycle lane Part of a carriageway designated for cycles and distinguished from the rest of the carriageway by longitudinal road markings. Mopeds may also be allowed to use a cycle lane. Cycle track Independent road or part of a road designated for cycles and sign-posted as such. A cycle track is separated from other roads or other parts of the same road by structural means. Mopeds may also be allowed to use the cycle track. Cycling infrastructure cycling-friendly infrastructure integrated into the roadway or in its own right of way Drainage gradient Farm-to-market road a state road or county road that connects rural or agricultural areas to market towns. Fork (literally “fork in the road”) Type of intersection where a road splits Grade Longitudinal slope Green lane (UK) Unsurfaced road, may be so infrequently used that vegetation colonises freely, hence 'green'. Many green lanes are ancient routes that have existed for millennia. Guide rail Prevents vehicles from veering off the road into oncoming traffic, crashing against solid objects or falling from a road. Also called a guard rail or traffic barrier. Gutter a drainage channel usually at the edge of the road or along a median. Interstate Highway System (United States) System of Interstate and Defense Highways Lane One of the longitudinal strips into which a carriageway is divisible, whether or not defined by longitudinal road markings, which is wide enough for one moving line of motor vehicles other than motor cycles. Layby (Pullout, pull-off) A paved area beside a main road where cars can stop temporarily to let another car pass. Loose chippings the hazard of stone chippings that have come loose Median On dual carriageway roads, including controlled-access highways, divided highways and many limited-access roads, the central reservation (British English), median (North American English), median strip (North American English and Australian English), neutral ground [Louisiana English] or central nature strip (Australian English): Area that separates opposing lanes of traffic Motorway (Europe) (Freeways in the US, Special road in the UK) Road, specially designed and built for motor traffic, which does not serve properties bordering on it, with separate carriageways for traffic in two directions, with no crossings at the same level (road, railway, tramway track, or footpath) and sign-posted as a motorway and is reserved for specific categories of road motor vehicles. Mountain pass A relatively low level route through a range of mountains Milestone One of a series of numbered markers placed along a road, often at regular intervals, showing the distance to destinations. National Highway Road built and maintained by a national authority. Pavement The road regarded as a geoconstruction. In the UK the term is road surface and the pavement is a pedestrian walkway alongside the road. Pedestrian crossing Designated point on a road where road marking or other means helps pedestrians cross safely Pelican crossing (officially Pelicon crossing) (UK) a PEdestrian LIght CONtrolled crossing. Private highway Highway owned and operated for profit by private industry Private road Road owned and maintained by a private individual, organization, or company rather than by a government Profile the vertical alignment of a road, expressed as a series of grades, connected by parabolic curves. Protected Intersections for Bicycles A much safer design with a corner refuge island, a setback crossing of the pedestrians and cyclists, generally between 1.5–7 metres of setback, a forward stop bar, which allows cyclists to stop for a traffic light well ahead of motor traffic who must stop behind the crosswalk. Separate signal staging or at least an advance green for cyclists and pedestrians is used to give cyclists and pedestrians no conflicts or a head start over traffic. The design makes a right turn on red, and sometimes left on red depending on the geometry of the intersection in question, possible in many cases, often without stopping. Protected Bicycle Path Cyclists ideally have a protected bike lane on separated by a concrete median with splay kerbs if possible, and have a protected bike lane width of at least 2 metres if possible (one way). In the Netherlands, most one way cycle paths are at least 2.5 metres wide. Public space Place where anyone has a right to come without being excluded because of economic or social conditions Ranch road U.S. road that connects rural and agricultural areas to market towns Road number Often assigned to identify a stretch of public roads – often dependent on the type of road, with numbers differentiating between interstates, motorways, arterial thoroughfares, etc. Road-traffic safety Process to reduce the harm (deaths, injuries, and property damage) that result from vehicle crashes on public roads Roadworks Part or all of the road is occupied for work or maintenance Roughness Deviations from a true planar pavement surface, which affects vehicle suspension deflection, dynamic loading, ride quality, surface drainage and winter operations. Roughness have wavelengths ranging from 500 mm up to some 40 m. The upper limit may be as high as 350 m when considering motion sickness aspects; motion sickness is generated by motion with down to 0.1 Hz frequency; in an ambulance car driving 35 m/s (126 km/h), waves with up to 350 m will excite motion sickness. Roundabout a road junction where typically three or more roads are joined by a circular section of road. Traffic 'on the roundabout' has priority over traffic on approach roads, unless indicated otherwise. In countries where traffic drives on the left the roundabout is travelled in a clockwise direction. Also known as an island in parts of the UK. Segregated Bicycle Path Cyclists ideally have a protected bike lane on separated by a concrete median with splay kerbs if possible, and have a protected bike lane width of at least 2 metres if possible (one way). In the Netherlands, most one way cycle paths are at least 2.5 metres wide. Shoulder (also hard shoulder) A clear, level area to the side of the roadway available for stopping if needed. State highway Road numbered by the state, falling below numbered national highways (like U.S. Routes) in the hierarchy or a road maintained by the state, including nationally numbered highways Traffic Pedestrians, ridden or herded animals, vehicles, bicycles, and other conveyances using any road for purposes of travel. Texture (roads) Deviations from a true planar pavement surface, which affects the interaction between road and tire. Microtexture have wavelengths below 0.5 mm, Macrotexture below 50 mm and Megatexture below 500 mm. Traffic calming Set of strategies used by urban planners and traffic engineers to slow down or reduce motor vehicle traffic, thereby improving safety for pedestrians and bicyclists and improving the environment for residents Traffic island (UK) a small raised area used to help define the traffic flow, which may also act as a refuge for pedestrians crossing the carriageway or a location for signs, barriers or lights – a synonym for roundabout in some parts of the UK Traffic light Also known as a traffic signal, stop light, stop-and-go lights – a signaling device at a road intersection, pedestrian crossing, or other location that assigns right of way to different approaches to an intersection Zebra crossing (UK) a pedestrian crossing marked by black and white stripes on the carriageway
Adverse camber where a road slopes towards the outside of a bend, increasing the likelihood that vehicles travelling at speed will skid or topple. Usually only a temporary situation during road maintenance. Alignment the route of the road, defined as a series of horizontal tangents and curves. All-weather road Unpaved road that is constructed of a material that does not create mud during rainfall. Banked turn Bicycle boulevard A street that allows local vehicle traffic, but is prioritized for bicycles and other non-motorized travel Belisha Beacon an orange globe, lit at night, used to highlight a pedestrian crossing
How Safe are Britain's Roads? - References - Netflix