Oval track racing

History While bicycle racing on oval-shaped tracks predates by several decades the automobile racing of this form, the earliest oval track auto racing may have taken place in the United States around the turn of the twentieth century. With distance endurance trials from oval tracks making news in 1905 (documenting a 52-second mile for example), and with a 1911 news report in Grand Rapids, Michigan warning would-be spectators of the dangers of uncontrolled wrecks. Pack racing (2021) Pack racing is a phenomenon found on fast, high-banked superspeedways. It occurs when the vehicles racing are cornering at their limit of aerodynamic drag, but within their limit of traction. This allows drivers to race around the track constantly at wide open throttle. Since the vehicles are within their limit of traction, drafting through corners will not hinder a vehicle's performance. As cars running together are faster than cars running individually, all cars in the field will draft each other simultaneously in one large pack. In stock car racing this is often referred to as "restrictor plate racing" because NASCAR mandates that each car on its two longest high-banked ovals, Talladega and Daytona, use an air restrictor to reduce horsepower. The results of pack racing may vary. As drivers are forced to race in a confined space, overtaking is very common as vehicles may travel two and three abreast. This forces drivers to use strong mental discipline in negotiating traffic. There are drawbacks, however. Should an accident occur at the front of the pack, the results could block the track in a short amount of time. This leaves drivers at the back of the pack with little time to react and little room to maneuver. The results are often catastrophic as numerous cars may be destroyed in a single accident. This type of accident is often called "The Big One". Comparison with road racing Oval track racing requires different tactics than road racing. While the driver does not have to shift gears nearly as frequently, brake as heavily or as often, or deal with turns of various radii in both directions as in road racing, drivers are still challenged by negotiating the track. Where there is generally one preferred line around a road course, there are many different lines that can work on an oval track. The preferred line depends on many factors including track conditions, car set-up, and traffic. The oval track driver must choose which line to use each time they approach a corner. On a short track in a 25-lap feature race, a driver might not run any two laps with the same line. Both types of racing place physical demands on the driver. A driver in an IndyCar race at Richmond Raceway may be subject to as many lateral g-forces (albeit in only one direction) as a Formula One driver at Silverstone. Weather also plays a different role in each discipline. Road racing offers a variety of fast and slow corners that allow the use of rain tires. Paved oval tracks generally do not run with a wet track surface. Dirt ovals will sometimes support a light rain. Some tracks (e.g., Evergreen Speedway in Monroe, WA) have "rain or shine" rules requiring races to be run in the rain. Safety has also been a point of difference between the two. While a road course usually has abundant run-off areas, gravel traps, and tire barriers, oval tracks usually have a concrete retaining wall separating the track from the fans. Innovations have been made to change this, however. The SAFER barrier was created to provide a less dangerous alternative to a traditional concrete wall. The barrier can be retrofitted onto an existing wall or may take the place of a concrete wall completely. ==Track classification ==

Oval tracks are classified based upon their size, surface, banking, and shape. By size Their size can range from only a few hundred feet to over two and a half miles. The definitions used to differentiate track sizes have changed over the years. While some tracks use terms such as "speedway" or "superspeedway" in their name, they may not meet the specific definitions used in this article. Short track A short track is an oval track less than one mile (1.6 km) long, with the majority being 0.5 miles (0.8 km) or shorter. Drivers seeking careers in oval track racing generally serve their apprenticeship on short tracks before moving up to series which compete on larger tracks. Due to their short length and fast action, these tracks are often nicknamed "bullrings". Professional-level NASCAR races on short tracks usually use a 500-lap or 400-lap distance. Short tracks in many cases have lights installed and routinely host night races. The short ovals still form the backbone of NASCAR in the feeder series. Six race tracks of this type are also represented in the top-level NASCAR Cup Series: Bowman Gray Stadium, Bristol, Iowa, Martinsville, North Wilkesboro and Richmond. Mile oval A 1-mile (1.61 km) oval is a popular and common length for oval track racing. The exact measurements, however, can vary by as much as a tenth of a mile and still fall into this category. Most mile ovals are relatively flat-banked, with Dover being a notable exception. Many 1-mile dirt ovals were used by stock cars or champ cars before race tracks with dirt surfaces were removed from the racing calendar in the early 1970s. Many of these racetracks got the nickname "Fairgrounds” — for example Arizona State Fairgrounds, California State Fairgrounds and Michigan State Fairgrounds Speedway. The origin of these racetracks was in harness racing, which commonly used 1-mile tracks. Also, the oldest oval race track, the Milwaukee Mile was originally a race track for horse racing. In NASCAR, 1-mile oval tracks are among the intermediate tracks. IndyCar rates these tracks as short ovals, since IndyCar does not usually run on ovals shorter than 1 mile, with the exception of Sanair, Richmond and Iowa. The 1-mile ovals have lost a great deal of their former importance for oval racing. Most of the racetracks abandoned by NASCAR or IndyCar in the 2000s were of this type. These include the Chicago Motor Speedway and the Walt Disney World Speedway, which were built during the 1990s construction boom but used for only four years. The historic Nazareth Speedway, which was paved in 1986, was completely abandoned after the 2004 season. Physically, many mile oval still exist such as the Rockingham Speedway and the Pikes Peak International Raceway. However, these racetracks have not been used by nationally important motorsports events for years. There are only three 1-mile tracks left on the NASCAR racing calendar: Phoenix, Loudon, and Dover. IndyCar only returned to 1-mile oval racing with the addition of the Milwaukee Mile in 2024 after 9 years of it being off the schedule. Intermediate (2011) Also referred to with the general term of "speedway", these courses are 1 to 2 miles (1.6 to 3.2 km) in length, but the term is particularly reserved for 1.5-mile (2.4 km) tracks. At the beginning of the history of NASCAR and IndyCar, this oval size was not very common. Until 1990, there were only five examples. Two of these, the Marchbanks Speedway (1.4 miles) and the Trenton Speedway (1.5 miles), were demolished in the 1970s and 1980s, and only three—Charlotte Motor Speedway, Atlanta Motor Speedway and Darlington Raceway—have survived to this day. All other ovals of this type were built after 1994. During the race track construction boom of the late 1990s, these tracks began to be labeled with the rather derogatory term "cookie cutter" tracks, as their differences were perceived to be minimal. In 1992, Charlotte became the first intermediate track to install lights and allow for night racing. It is now commonplace for these types of tracks to host night races. Intermediate tracks usually have moderate to steep banking. Almost all modern race tracks that are still used in NASCAR and IndyCar today are of this type. Since their size allows them to compromise high speeds with sightlines, especially tri- and quad-ovals of 1.5-mile length have become commonplace in major racing series that use oval tracks. While intermediate speedways were designed primarily with stock cars in mind, they were also believed to be suited to host Indy cars as well. In the early years of the Indy Racing League, the series visited several intermediate tracks. The higher-downforce, normally aspirated IRL-type cars proved to be competitive at several of the tracks. The CART series however, mostly stayed away as the faster, more powerful Champ Cars were generally thought to be too fast for this type of circuit. This became evident at the 2001 Firestone Firehawk 600, when drivers experienced vertigo-like symptoms, and the race was cancelled for safety reasons. These tracks began to be removed from the Indy car schedule in the late-2000s and early-2010s due to low crowds and serious crashes, including the fatal accident involving Dan Wheldon at Las Vegas in 2011. As of 2025, the IndyCar Series abandoned all intermediates with only exception of Nashville Superspeedway (1.33 miles) for season finale. Superspeedway Originally a superspeedway was an oval race track with a length of one mile or more. Since the introduction of the intermediate oval, Superspeedway is an oval race course of 2 miles or longer. There are five active superspeedways in the United States, the most famous being Indianapolis Motor Speedway and Daytona International Speedway, both long. These tracks were built in 1909 and 1959 respectively. Indianapolis Motor Speedway was built as a facility for the automotive industry to conduct research and development. Daytona International Speedway was built as a replacement for the Daytona Beach Road Course, which combined the town's main street and its famous beach. Daytona hosts the Daytona 500, NASCAR's most prestigious race, while the Indianapolis Motor Speedway is home to the Indianapolis 500 and the Brickyard 400. The longest superspeedway in North America is the Talladega Superspeedway in Lincoln, Alabama. Built in 1969, it is long, and holds the current record (set in 1987) for fastest speed in a stock car: lapping at an average of and reaching at the end of the backstretch. The later closed and partially demolished Texas World Speedway, was the site of Mario Andretti's closed-course record of which was set in 1973. The California Speedway was the site of Gil de Ferran's qualifying lap of in the CART FedEx Championship Series in 2000, the fastest qualifying lap recorded at an official race meeting. Other superspeedways used by NASCAR include the Michigan International Speedway, the sister track of Texas World Speedway, as well as Pocono Raceway and Ontario Motor Speedway. Michigan Speedway, Texas World Speedway and the now-closed California Speedway are often considered intermediate tracks by NASCAR due to their similarities with 1.5-mile tracks, while Ontario, Pocono and Indianapolis are classified separately, as they are the only long, flat tracks on the schedule. Apart from Talladega, the IndyCars also ran at least one race on all superspeedways which NASCAR uses. Due to the low number of spectators or safety concerns by the drivers, IndyCar no longer uses super speedways outside of Indianapolis. In NASCAR they are still an essential part of the racing calendar. Texas World Speedway and Ontario Motor Speedway were abolished by NASCAR and IndyCar in the 1980s, the California Speedway was closed and demolished in the 2020s. As of 2025, all other superspeedways are still open and are still being used for racing. Track length disputes NASCAR and IndyCar use different measuring systems to measure the oval race tracks. As a result, the racetracks have lengths of different accuracy. The following table shows the values that NASCAR, IndyCar and CART/CCWS used to determine the lap speeds and track records. By shape A typical oval track consists of two parallel straights, connected by two 180° turns. Although most ovals generally have only two radii curves, they are usually advertised and labeled as four 90° turns. While many oval tracks conform to the traditional symmetrical design, asymmetrical tracks are not uncommon. Classical geometric shapes Additional prominent examples: File:EvergreenSpeedway.svg|Evergreen Speedway File:NashvilleSpeedwayMap.svg|Fairgrounds Speedway File:IndianapolisRacewayParkMap.svg|Indianapolis Raceway File:MesaMarinSpeedwayMap.svg|Mesa Marin Speedway File:North Wilkesboro Speedway 2024.svg|North Wilkesboro Speedway File:SalemSpeedwayMap.svg|Salem Speedway File:ThompsonInternationalSpeedwayMap.svg|Thompson International Speedway File:USA International Speedway - Lakeland Fl.svg|USA International Speedway File:The Milwaukee Mile.svg|Milwaukee Mile File:New Hampshire Motor Speedway 2024.svg|New Hampshire Motor Speedway File:Atlanta International Speedway.svg|Atlanta International Speedway File:Rockingham Motor Speedway.png|Rockingham Motor Speedway File:EuroSpeedway Lausitz tri-oval diagram.svg|EuroSpeedway Lausitz File:Trióvalo Bernardo Obregón.png|Trióvalo Bernardo Obregón Tri-ovals The tri-oval is the common shape of the ovals from the construction booms of the 1960s and 1990s. The use of the tri-oval shape for automobile racing was conceived by Bill France Sr. during the planning for Daytona. The triangular layout allowed fans in the grandstands an angular perspective of the cars coming towards and moving away from their vantage point. Traditional ovals (such as Indianapolis) offered only limited linear views of the course, and required fans to look back and forth much like a tennis match. The tri-oval shape prevents fans from having to "lean" to see oncoming cars, and creates more forward sight lines. The modern tri-ovals were often called as cookie cutters because of their (nearly) identical shape and identical kind of races. Additional prominent examples: File:Chicagoland Speedway diagram.svg|Chicagoland Speedway File:Kansas Speedway 2024.svg|Kansas Speedway File:Kentucky Speedway.svg|Kentucky Speedway File:Nashville Superspeedway 2024.svg|Nashville Superspeedway File:Phakisa Freeway - Speedway.svg|Phakisa Freeway File:Atlanta Motor Speedway 2024.svg|Atlanta Motor Speedway File:Texas Motor Speedway 2024.svg|Texas Motor Speedway File:Calder Park (Australia) track map--Thunderdome Speedway.svg|Calder Park Thunderdome Superspeedway File:Ovalo de Chiapas.png|Autodromo Chiapas File:Ovalo Aguascalientes.png|Ovalo Aguascalientes File:Richmond Raceway 2024.svg|Richmond Raceway (altered design) File:Memphis International Raceway diagram.svg|Memphis International Raceway File:MyrtleBeachSpeedwayMap.png|Myrtle Beach Speedway File:Auto Club Speedway (formerly California Speedway) - Speedway.svg|Auto Club Speedway File:Texas World Speedway-Superspeedway.svg|Texas World Speedway File:Talladega Superspeedway 2024.svg|Talladega Superspeedway Unique shapes There are a lot of oval tracks, which neither have a classical geometric shape nor still represent a modern tri-oval in the strict sense. While these courses still technically fall under the category of ovals, their unique shape, flat corners, hard braking zones, or increased difficulty, often produces driving characteristics similar to those of a road course. Concentric oval track / legends oval Some facilities feature several ovals track of different sizes, often sharing part of the same front straightaway. The now defunct Ascot Speedway featured 1/2 mile and 1/4 mile dirt oval tracks, and Irwindale Speedway features 1/2 mile and 1/3 mile concentric paved oval tracks. Pocono Raceway once had a 3/4 mile oval which connected to the main stretch, and circled around the garage area. In 1991, Charlotte Motor Speedway connected the quad oval start-finish straight to the pit lane with two 180 degree turns, resulting in a concentric 1/4-mile oval layout. The 1/4-mile layout became a popular venue for legends car racing. The name "legends oval" was derived from this use. They have also seen use with go-karts, short track stock cars, and other lower disciplines. This idea was adopted by numerous tracks including Texas Motor Speedway, Atlanta Motor Speedway, Kentucky Speedway, Las Vegas Motor Speedway, and Iowa Speedway which has a 1/8 mile version. Perhaps the most unusual concentric oval facility is Dover Speedway-Dover Downs. The one-mile oval track encompasses a 0.625-mile harness racing track inside. By banking / superelevation , Germany (1955) , Italy (2007) Oval tracks usually have slope in both straight and in curves, but the slope on the straights is less, circuits without any slope are rare to find, low-slope are usually old or small tracks, high gradient are more common in new circuits. Circuits like Milwaukee Mile and Indianapolis Motor Speedway have 9° banking in the turns and are considered low banked, superspeedways like Talladega have up to 33° of tilt in curves, Daytona has up to 32°, both are considered high banked. Atlanta is the intermediate track with the highest banking, 28°. Winchester has the highest banking of any active oval track with 37° By surface and Banger racing - Mildenhall Stadium, Suffolk, England (2006) Track surfaces can be dirt, concrete, asphalt, or a combination of concrete and asphalt. Some ovals in the early twentieth century had wood surfaces. Indianapolis Motor Speedway's track surface used to be made entirely of bricks, and today, 3 feet (0.91 m), or one yard, of original bricks remain exposed at the start-finish line. Each was hand laid over a 2-inch (51 mm) cushion of sand, then leveled and the gaps filled with mortar. Before the work was completed, locals nicknamed the track "The Brickyard". ==Combined road course==

A combined road course, colloquially referred to as a "roval" (a blend word combining "road course" and "oval") is an oval track racing facility that features a road course in the infield (and/or outfield), that is usually linked to the oval circuit. This type of course makes for a multi-purpose track, and allows the facility to be used for both oval and road racing. A typical combined road course consists of the oval portion of the track, using the same start/finish line, and same pit area, but a mid-course diversion to a winding road circuit in the infield (and/or outfield). At some point, the circuit leads back to the main oval, and completes the rest of the lap. On some of the faster ovals, a chicane is present on long back-straights, to keep speeds down, and create additional braking/passing zones. Some more complex facilities feature a stand-alone road course layout(s) in the infield not directly linked to the oval layout, or otherwise using only a short portion of the oval. Combined road courses combine the high speed characteristics of ovals with the technical precision of road courses. It allows road racing disciplines the unique experience of being held in the stadium style atmosphere of an oval superspeedway. Numerous combined road courses saw widespread use with sports cars in the 1970s and early 1980s. However, their use at the professional level has since diminished considerably, since most layouts lacked the desirable topography and competitive challenges of natural road courses. In addition, most combined road course circuits offer poor sightlines for fans sitting in the grandstands. Oftentimes the challenging infield portion is obscured or not visible at all from the grandstands that line the circumference of the oval track, so many fans choose to view from the ground level inside the infield – leaving the grandstands mostly empty and unsightly. Many combined road course layouts have been abandoned. However, some have enjoyed extended life as venues for testing, driving schools, and amateur race meets. Since 1962, the most famous race continuously held on a combined road course has been the 24 Hours of Daytona. Since 2018, NASCAR has held the Bank of America Roval 400 on a combined course at Charlotte. A second, one-off race at Daytona's combined course was also present in NASCAR's calendar in 2020 and 2021. In some rare examples, the combined road course layout is run in the opposite direction to the oval circuit. For instance, at Indianapolis the oval is run counter-clockwise, but the combined road course used during the IndyCar Series Grand Prix of Indianapolis is run clockwise. However the MotoGP races were run counter-clockwise, with some reconfigured corners to fix corner apex problems. Michigan was also an example of a clockwise combined road course. Another example is the Adelaide International Raceway in Australia which combines a 2.41 km (1.50 mi) road course with an 0.805 km (0.500 mi) speedway bowl. The Bowl forms a permanent part of the road course and also runs clockwise. At many tracks, multiple configurations are available for the combined road course layout(s). An example of an outfield combined road course can be seen at the Calder Park Raceway in Melbourne, Australia. The Calder Park complex has a 1.119 mi (1.801 km) high-banked oval speedway called the Thunderdome as well as a separate road course. The road course and the oval can be linked via two short roads that connect the front straight of the road course to the back straight of the oval. As they are separate tracks, this creates a unique situation where different races can actually be run on both the oval and the full road course at the same time. Also unique is that unlike most combined circuits which use the oval track's start/finish line and pits, in the case of Calder Park it is the road course start/finish line and pits that are used. This configuration was used only twice (both in 1987) and has not been used for major motor racing since hosting Round 9 of the 1987 World Touring Car Championship. Prominent examples: File:Charlotte Motor Speedway Roval 2024.svg|Charlotte Motor Speedway, a quad-oval, with its infield road course File:Daytona International Speedway Road Course 2024.svg|The combined road course layout at Daytona used for the Rolex 24 File:Calder Park (Australia) track map--Combined road and Thunderdome (oval) course.svg|Calder Park Raceway in Australia, an outfield combined road course File:Indianapolis Motor Speedway Grand Prix Road Course 2024.svg|Indianapolis Motor Speedway road course ==Oval track construction booms in North America==

There have been two distinct oval race track construction "booms" in the United States. The first took place in the 1960s, and the second took place in the mid-to-late 1990s. The majority of tracks from the 1960s boom and the 1990s boom have survived, but some tracks failed to achieve long-term financial success. Incidentally, these two booms loosely coincided with the similar construction boom of the baseball/football cookie-cutter stadiums of the 1960s and 1970s, and the subsequent sport-specific stadium construction boom that began in the 1990s. Tracks built during the 1960s boom ; Current • Daytona International Speedway (1959) • Atlanta Motor Speedway (1960; substantially reconstructed in 1997; reprofiled in 2022) • Charlotte Motor Speedway (1960) • North Carolina Motor Speedway (1965) • Dover International Speedway (1966) • Michigan International Speedway (1968) • Talladega Superspeedway (1969) • Pocono Raceway (1971) ; Former • Marchbanks Speedway (short oval exists since 1951, intermediate tri-oval build 1960; facility closed and demolished 1970) • Texas World Speedway (1969; primarily amateur racing and testing from 1981–2016; closed 2017, demolished in 2020) • Trenton Speedway (mile oval exists since 1946, intermediate dogleg oval build 1969; facility closed 1980; track demolished in 1981) • Ontario Motor Speedway (1970; demolished in 1980) Tracks built during the 1990s boom ; Current • Homestead–Miami Speedway (1995) • Las Vegas Motor Speedway (1996) • Texas Motor Speedway (1996) • World Wide Technology Raceway (1997) • Pikes Peak International Raceway (1997; hosting only non-major events since 2008) • Kentucky Speedway (2000; no race since 2021) • Kansas Speedway (2001) • Chicagoland Speedway (2001; closed in 2020 due to COVID-19 pandemic, O'Reilly and Cup Series made return in 2026.) • Nashville Superspeedway (2001; closed 2011, reopened 2021) • Iowa Speedway (2006; closed in 2020 due to COVID-19 pandemic, held only ARCA Menards Series in 2021, IndyCar returned in 2022, Xfinity Series returned in 2024 and Cup made debut in 2024.) ; Former • Walt Disney World Speedway (1996; demolished 2015–2016) • California Speedway (1997; superspeedway closed and partially demolished in 2023 for planned new short track) • Memphis International Raceway (1998; closed in 2022; is to be demolished) • Chicago Motor Speedway (1999; demolished in 2009) == International oval tracks ==

Most of the oval tracks are located in the United States, Mexico, and Canada. However, there are also many oval tracks elsewhere too, as listed below. Current • Adelaide International Raceway in Australia, short track • Autodrome de Linas-Montlhéry in France, intermediate oval • Autódromo Internacional de Luanda in Angola, 3.208 kilometres (1.993 mi) rectangular oval • Autódromo Ciudad de Rafaela in Argentina, superspeedway • Bahrain International Circuit in Bahrain, intermediate oval • Calder Park Thunderdome in Australia, intermediate quad-oval • EuroSpeedway Lausitz in Germany, triangular superspeedway • Foxhall Stadium in The United Kingdom, • Highlands Motorsport Park in New Zealand, short track • Mallory Park in the United Kingdom, intermediate oval • Penbay International Circuit in Taiwan, short track tri-oval • Phakisa Freeway in South Africa, D-shaped intermediate oval • Raceway Venray in the Netherlands, short track, new circuit • Tipperary Raceway in Ireland, • Twin Ring Motegi in Japan, egg-shaped intermediate oval Former • Autódromo de Sitges-Terramar in Spain, high banked intermediate oval • Autodromo Nazionale di Monza in Italy, high banked superspeedway • AVUS in Germany, high banked superspeedway • Brooklands in the United Kingdom, kidney-bean-shaped high banked superspeedway • Emerson Fittipaldi Speedway in Brasil, trapezoid intermediate oval • Opel-Rennbahn in Germany, high banked short oval • Raceway Venray in the Netherlands, short track, old circuit • Rockingham Motor Speedway in the United Kingdom, trapezoid intermediate oval • Tours Speedway in France, temporary short track ==See also==