[TRANSLATION: 50 years at 50 km/h: In the Frenzy of the Economic Miracle: Germany is world-famous for unlimited speeds on motorways. Work on the Reichsautobahn was halted in 1943, by which time about 1,300 miles of roadway were completed. This feat of engineering allows two modes of transportation to coexist without costly construction of independent alternatives. Curves are gentle and slightly banked, and grades are limited to 4 percent. In 2015, the left-green coalition government of Thuringia declared that a general autobahn limit was a federal matter; Thuringia would not unilaterally impose a general statewide limit, although the Thuringian environmental minister had recommended a 120 kilometres per hour (75mph) limit. "[1] Some speed limits are implemented on different autobahns.[28]. The autobahns formed the first limited-access, high-speed road network in the world, with the first section from Frankfurt am Main to Darmstadt opening in 1935. There areunrestricted speedsections of the Autobahn, as well as areas with speed limits. connecting two major cities or regions within Germany) have a double digit number (e.g. To cater to the average of 50,000 vehicles per day on any given segment of the road, the Autobahn features two, three and occasionally four lanes per direction. endobj 75 0 obj >/Filter/FlateDecode/ID[939674838A53784E9EDF58D66ABDF27D>0C10BCA61105274BA6C658A581AD63FC>]/Index[56 41]/Info 55 0 R/Length 99/Prev 6074013/Root 57 0 . It is access-controlled and only allows vehicles that can go faster than 60 km/h (37,3 mph). Change), You are commenting using your Facebook account. The SP1500 and SP1500L models have been used to help upgrade a stretch of the BAB A9 Autobahn in Thuringia. Over 90% of autobahn mileage constructed during the Nazi period had Portland cement concrete pavement, normally about eight inches thick. The Federal Road Research Institute (Bundesanstalt fr Straenwesen) solicited information about speed regulations on autobahns from the sixteen States and reported the following, comparing the years 2006 and 2008: Except at construction sites, the general speed limits, where they apply, are usually between 100km/h (62mph) and 130km/h (81mph); construction sites usually have a speed limit of 80km/h (50mph) but the limit may be as low as 60km/h (37mph). Though it's difficultto connect tailgating directly to the cause of rear-end collisions, when you tailgate, you have less time to react to abrupt situations that could happen in front of you. How many crashes has there been on the autobahn? [56] The fatality rate trend on the German autobahn mirrored those of other nations' motorways that imposed a general speed limit. Was kaum einer wei: Bis zum 1. Which is a good thing! The notion that there are no autobahn speed limits isn't entirely true: About 30-percent of the network has speed limits that range from 80-130 kph (50-81 mph). Autobahn history - DW - 08/04/2012 Before that some . And better drivers means fewer accidents, fewer accidents means fewer deaths:Germany has far fewermotor vehicle-related fatalities (per 100,000 people) than the US. But working. Germany maintains a country-wide standard, whereas US inspections are handled on a state-by-state basis. Two . Some limits were imposed to reduce pollution and noise. Concrete offers a high resistance to deformation as well as a high load-bearing capacity able to cope with a high percentage of large trucks, while requiring minimal maintenance. [11], Meanwhile, the median strips of some autobahns were paved over to allow their conversion into auxiliary airstrips. Enforcement on the federal Autobahnen is handled by each state's highway patrol (Autobahnpolizei), often using unmarked police cars and motorcycles and usually equipped with video cameras,[108][109] thus allowing easier enforcement of laws such as tailgating. In the 1930s, when construction began on the system, the official name was Reichsautobahn. Shorter autobahns that are of regional importance (e.g. | svz.de", "Infografik: So viele Menschen sterben auf den Autobahnen Europas", "Sind Autobahnen mit Tempolimit sicherer? Some sections cut by the Iron Curtain in 1945 were only completed after German reunification in 1990. During World War II, many of Germany's workers were required for various war production tasks. The Autobahn is a great example of how transportation systems can be designed to best deal with all situation that may occur. Nein, danke US news Environment Climate Change NBC News", "Autobahn speed limit proposal revs up debate in Germany", "Driving the Autobahn? Just prior to the 1973 oil crisis, Germany, Switzerland,[47] and Austria[48][49] all had no general speed restriction on autobahns. The route runs from Brandenburg through Saxony-Anhalt, Saxony, Thuringia and into Bavaria. In 1993, the Social Democratic-Green Party coalition controlling the State of Hesse experimented with a 90km/h (56mph) limit on autobahns and 80km/h (50mph) on other rural roads. I think the concept of freeze-resistant pavement is cool. Limits can also be temporarily put into place through dynamic traffic guidance systems that display the corresponding message. As of 2021[update], Germany's autobahn network has a total length of about 13,192 kilometres (8,197mi). To comply with this limit, heavy-duty trucks in Germany (e.g. comes up on a fairly regular basis and is always defeated, Driving the high-speed sections of the autobahn. (Perfectly valid use of the term, but kind of funny.). [61] The federal government sponsored a large-scale experiment with a 100km/h (62mph) speed limit in order to measure the impact of reduced speeds on emissions and compliance. In December 2010 video game developer Synetic GmbH and Conspiracy Entertainment released the title Alarm fr Cobra 11 Die Autobahnpolizei featuring real world racing and mission-based gameplay. The autobahn's total length is 12.996 kilometres, enough to drive from Berlin to Darwin in Australia! Lane discipline is strict (though not as well observed as you might expect, especially nowadays), tailgating is frowned upon, and passing on the right is strictly forbidden. To accommodate higher speed traffic, Autobahn road surfaces are constructed with multiple layers of concrete. Need for Speed: Porsche Unleashed also had a track that had the player drive across different sections of the autobahn. [105], The Federal Environmental Office reported that, on a free-flowing section in 1992, the recorded average speed was 132km/h (82mph) with 51% of drivers exceeding the recommended speed.[105]. "The way it is constructed is an example of the art of engineering." The Autobahn is financed by taxes and maintained by the German state itself and not the regions it crosses. [11], The autobahns were not primarily intended as major infrastructure improvement of special value to the military as sometimes stated. The contraction joints are cut so that they are wider at the top, forming a reservoir 8-15 mm (;{-Y, in.) The thickness is hardly surprising. Most newcomers are shocked by the countless luxury limousines and ridiculously fast sports convertibles zipping down the left lane at speeds around 240 km/h, usually while bullying slow movers out of the way with indignant honking and incessant headlight . Also, I took freeze-resistant concrete to mean that maintenance due to weather-induced road surface breakdown is less frequently needed. The contracting team has been using two Wirtgen pavers to lay the top and bottom layers, wet on wet, For more information on companies in this article. [2] While driving faster is not illegal in the absence of a speed limit, it can cause an increased liability in the case of a collision (which mandatory auto insurance has to cover); courts have ruled that an "ideal driver" who is exempt from absolute liability for "inevitable" tort under the law would not exceed Richtgeschwindigkeit. Various other controlled-access highways exist on the federal (Bundesstrae), state (Landesstrae), district, and municipal level but are not part of the Autobahn network and are officially referred to as Kraftfahrstrae (with rare exceptions, like A 995 Munich-GiesingBrunntal until 2018). The advisory speed limit was adopted in 1978. MS-22S Principios de Construccion de Pavimentos de Mezcla Asfaltica en Caliente. The end result is that driving fast on German autobahns can be an exhausting experience, a sharp contrast from the more relaxed driving style common on American highways. Some stretches have minimum speeds of 90 kph (56 mph) or 110 kph (68 mph) in certain lanes. The five-tiered earthen staircase is strengthened by a reinforced concrete core over 1000 feet thick at the base. On 1 January 2005, a new system came into effect for mandatory tolls (Mautpflicht) on heavy trucks (those weighing more than 12 t) while using the German autobahn system (LKW-Maut). A residential driveway will not have the same heavy loads as a commercial or industrial driveway which tend to have lots of truck traffic and a higher volume of vehicles. The Nazi government passed the Road Traffic Act in 1934, limiting speeds to 60 kph (37 mph) in urban areas but setting no limit for rural roads or autobahns. The Autobahns volume is impressive and combined with the speed of travel make it one of the best roadways in the world. For breaks during longer journeys, parking sites, rest areas, and truck stops are distributed over the complete Autobahn network. It wasn't until Adolf Hitler realized the propaganda value of individual mobilitya nation-wide road network and an affordable "people's car" to populate itthat the Nazis embraced the idea. The onset of war detracted from construction efforts, and the Nazis didn't see the road network as much of a military asset, though some sections did have their center medians paved so they could be used as airstrips. [18], Germany's autobahn network has a total length of about 13,192 kilometres (8,197mi) in 2021[19]), and a density of 36 motorway kilometres per thousand square kilometers (Eurostat) which ranks it among the densest and longest controlled-access systems in the world, and fifth in density within the EU in 2016 (Netherlands 66, Finland 3). The German Autobahn [A Detailed Guide for First-Timers] - Simple Germany Drivers may face fines and up to six months' suspension, should it come to a stop that was deemed unnecessary by the police. The Autobahn spans nearly the entire length of Germany and has been called the pinnacle of the German driving experience because of the German pride in automotive technology, racing and transportation efficiency. If you're going to drive crazy fast, don't forget to respect the Autobahn for the amazing 7,500 mile highway system that it is. [57], In the mid-1980s, acid rain and sudden forest destruction renewed debate on whether or not a general speed limit should be imposed on autobahns. At high speeds, pavement irregularities can become fatal obstacles, so Germany's autobahn roadways receive frequent and detailed inspection. The German Autobahn has taken on an almost legendary mystique. Take a poll, and you'll likely find that just about every gearhead dreams of driving on autobahns, Germany's speed-limit-free, no-holds-barred highwaysthough driving them isn't necessarily the experience you might expect. Mandated every 50 kilometres (31mi) or so, rest areas are usually open all night. If the patio will be used for seating or tables, a 6-inch thickness is recommended. Plastic lion Sun plaque mold concrete plaster casting garden mould 9.75" x 1/3" Some of these limits are static while others are dynamic, changing based on traffic and road conditions. For example, there are green medians with bushes and small trees along with minimal disturbances to the environment adjacent to the roadway. The Autobahn (IPA: [atoban] (listen); German plural Autobahnen) is the federal controlled-access highway system in Germany. Precision paving performance has been achieved on a major road project in Germany, using Wirtgen slipform pavers. Worst case scenario: you could be stuck with a $450 ticket. On the A9 job site, the two Wirtgen pavers laid down the two-layer concrete pavement in just one pass at a rate of around 400-500m/day. Stop doing that! The 19km widening job for the A9 between Triptis and Schleiz was based for the first time in Germany using a new model of public-private partnership, with payment dependent on the quality of service provided. Major German car manufacturers, except Porsche, follow a gentlemen's agreement by electronically limiting the top speeds of their carswith the exception of some top of the range models or enginesto 250km/h (155mph). Repair of the existing road network began in earnest, and by 1953 the West German government began to focus on expanding it. Motor vehicles, such as trucks, could not carry goods or troops as quickly or in as much bulk and in the same numbers as trains could, and the autobahns could not be used by tanks as their weight and caterpillar tracks damaged the road surface. The speed limits on the GDR autobahns were rigorously enforced by the Volkspolizei, whose patrol cars were frequently found hiding under camouflage tarpaulins waiting for speeders. An appalling rise in traffic deaths led to a country-wide speed limit of 100 kph (62 mph) in 1972, though autobahns remained unrestricted. No cyclists, no pedestrians, no crossing traffic, hardly any direct oncoming traffic. In West Germany (FRG), most existing autobahns were repaired soon after the war. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Instead, Caltrans replaces damaged concrete in sections (approximately 12 feet wide by 10 ft long). PDF Lon We st Germany - Transportation Research Board [95], Although Germany has a very low total traffic-related death rate, if only the mortality rate on highways is considered, Germany is in the rear midfield in a Europe-wide comparison of the number of traffic fatalities per thousand kilometers driven on highways in 2016. You also have to keep one eye glued to the mirror for Porsches and big Mercedes coming up fast from behindthey really do seem to materialize out of thin air. I have been on the Autobahn before and it really does look and feel like a normal highway. In the 1930s, a ten-kilometre stretch of what is today Bundesautobahn 9 just south of Dessaucalled the Dessauer Rennstreckehad bridges with no piers and was designed for cars like the Mercedes-Benz T80 to attempt to make land speed records. The route runs from Brandenburg through Saxony-Anhalt, Saxony, Thuringia and into Bavaria. [52] Adjacent nations with unlimited speed autobahns, Austria[48][49] and Switzerland,[47] imposed permanent 130km/h (81mph) limits after the crisis. [23] Construction works discontinued the next year and were not resumed until 1955. The main Autobahn leading out of this city (A656) in Germany was recently repaved (last year and earlier this year). While the Germans are fanatical about road inspection, there's no guarantee they will find a pothole before you do, so you also need to keep a careful eye on the road condition ahead. The propaganda ministry turned the construction of the autobahns into a major media event that attracted international attention.[13]. Most rest areas also have restaurants, shops, public telephones, Internet access, and a playground. The Autobahn - The German Way & More Germany's autobahns are famous for being among the few public roads in the world without blanket speed limits for cars and motorcycles. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Intercontinental Autonomous Challenge (DriverlessVehicles). Here's the most important rule of driving on the Autobahn: The left lane is for driving fast. 1/2001", "Last section of Germany's Autobahn, built in 1936, to disappear", "Lngenstatistik der Straen des berrtlichen Verkehrs, Stand: 1. [Translation: 50 years at 50km/h: In the Frenzy of the Economic Miracle]", "50 Jahre Tempo 50: Im Taumel des Wirtschaftswunders [Translation: 50 years at 50km/h: In the Frenzy of the Economic Miracle]", "50 Jahre Tempo 50: Im Taumel des Wirtschaftswunders: Fr das fehlende Tempolimit auf Autobahnen ist Deutschland weltberhmt. Burnout 3: Takedown named them as Alpine while Burnout Dominator divided them into two (Autobahn and Autobahn Loop). Certain limits are imposed on some classes of vehicles: Additionally, speed limits are posted at most on- and off-ramps and interchanges[30] and other danger points like sections under construction or in need of repair. [9], Just days after the 1933 Nazi takeover, Adolf Hitler enthusiastically embraced an ambitious autobahn construction project, appointing Fritz Todt, the Inspector General of German Road Construction, to lead it. For the Austrian Autobahn system, see, Selected Autobahn signs with route markers for, Bundesministerium fr Verkehr und digitale Infrastruktur, right to bear arms in the American debate, the paired City-State of Bremen and Bremerhaven, List of controlled-access highway systems, Evolution of motorway construction in European nations, "Verordnung ber eine allgemeine Richtgeschwindigkeit auf Autobahnen und hnlichen Straen", "BASt 2017 Publikationen Tempolimits auf Bundesautobahnen 2015", "Auswirkungen eines allgemeinen Tempolimits auf Autobahnen im Land Brandenburg", "The myth of Hitler's role in building the German autobahn", "Working Papers in the History of Mobility No. [12] Their military value was limited as all large-scale military transportation in Germany was done by train to save fuel. Expansion joints are usually omitted and contraction jomt spacings vary from 15 to about 35 ft. How is the Autobahn legal? Eastwest routes are even-numbered, northsouth routes are odd-numbered. Mom heart mold 8" x 5" x 1" thick reusable plaster concrete resin plastic mould. The main autobahns going all across Germany have a single digit number. [68] While this initiative is primarily a part of the SPD's general strategic outline for the future and, according to practices, not necessarily meant to affect immediate government policy, the proposal had stirred up a debate once again; Germany's chancellor since 2005, Angela Merkel, and leading cabinet members expressed outspoken disapproval of such a measure. Despite the increasing use of mobile phones, there are still about 150 calls made each day on average (after some 700 in 2013). The literal meaning of the word Bundesautobahn is 'Federal Auto(mobile) Track'. Parts of the HaFraBa were completed in the late 1930s and early 1940s, but construction eventually was halted by World War II. They are usually found every few kilometres. The machine then distributes this material across the entire paving width with its spreading plough, installs the top-layer concrete wet-in-wet when passing over it and simultaneously compacts it. If the inputs are tweaked slightly, for example, going from an 8-inch to a 9-inch thick concrete pavement, it will result in an increase of 105% . East Prussia, Farther Pomerania, and Silesia; these territories became parts of Poland and the Soviet Union with the implementation of the OderNeisse line after World War II. By the turn of the century the German Autobahn System was growing again, and in 2004 it became the third-largest superhighway system in the world, behind the U.S. and China. Jackson and Harold Allen Publication: Journal Proceedings Volume: 44 Issue: 6 Appears on pages(s): 933-976 Keywords: none Date: 6/1/1948 Abstract: The inspection upon which this paper is based was prompted by a desire to reconcile conflicting reports which have come out of Germany during the last 3 years regarding the . These highways are considered autobahnhnlich (autobahn-like) and are sometimes colloquially called Gelbe Autobahn (yellow autobahn) because most of them are Bundesstraen (federal highways) with yellow signs. This roadway was built with freeze-resistant concrete or a bituminous surface and the roadbed and surface typically measure 75 cm in thickness to ensure cold-weather safety prevent warping. When driving on an unrestricted section of autobahn in Germany, you must look far down the roadyou may be bombing down the highway at 180 kph (112 mph) when a car doing 130 pulls into the left lane in front of you to pass a truck limited to 80 kph. That's true, but not for the whole thing. Unless you're tailgating or speeding in a speed-limited area ordoing something else illegal. Its coexistence with nature improves the aesthetics and may have some environmental benefits as well. Construction on what became known as the Reichsautobahn proceeded rapidly, with an emphasis on east-west and north-south connections, and routes that showed off the German scenery. The Autobahn originated as an experimental highway for motorcars only between 1913 and 1921. A24, connecting Berlin and Hamburg). [86], In 2019, the Green Party introduced a motion to introduce a hard 130km/h speed limit on the autobahn, but it was defeated in the Bundestag. The work required laying the surface for six motorway lanes extending 19km has required some 165,000m3 of concrete. The autobahns of East Germany (GDR) were neglected in comparison to those in West Germany after 1945. Free shipping. Germany has far fewermotor vehicle-related fatalities (per 100,000 people) than the US, the National Transportation Safety Board reported. ", "Traffic and Accident Data: Summary Statistics Germany", "Zeitgeschichte in Hessen Daten, Fakten, Hintergrnde", "East German Traffic Deaths Jumped Dramatically After Reunification; Researchers Cite Rapid Increase in Young, Unskilled Drivers", "Traffic Safety The German Experience after Reunification", "Car lobby angry at plan to limit autobahn speeds", "Slow Down: German State Introduces Autobahn Speed Limit", "Als erstes Bundesland: Bremen fhrt Tempolimit ein", "Tensions Rise in The Heartland of German Automotive Industry", "bw-fairs.de: The automotive industry in Baden-Wrttemberg", "Autobahn speed limits: Germany's love of the fast lane", "Vorerst kein generelles Tempolimit auf Autobahnen", Application by FDP/DVP and statement by Ministry for Traffic regarding a general speed limit of 120 km/h on, "Vorerst kein generelles Tempolimit in Sachsen", "Verkehrstote in Hessen: Grne fordern Tempolimit", "Auf 22 Streckenabschnitten: Hessen lockert Tempolimit auf Autobahnen", "Verkehrsminister Rentsch hebt mehrere Tempolimits auf", "Vorerst kein Tempolimit auf Thringer Autobahnen", "Speed Limits Coming to the Autobahn in the Home State of Porsche, Mercedes News Car and Driver", "Greens face rightward shift despite victory", "Baden-Wrttemberg: Grner Verkehrsminister will Schweizer Raser ausbremsen", "Green push for autobahn speed limit fails in Bundestag", "Strecken ohne Tempolimit fordern 70 Prozent der Todesopfer", "#Faktenfuchs: Was bringt ein Tempolimit auf Autobahnen? During the crisis, like other nations, Germany imposed temporary speed restrictions; for example, 100km/h (62mph) on autobahns effective 13 November 1973. (LogOut/ By 1936, 130,000 workers were directly employed in construction, as well as an additional 270,000 in the supply chain for construction equipment, steel, concrete, signage, maintenance equipment, etc. [1] However, limits are posted and enforced in areas that are urbanised, substandard, accident-prone, or under construction. The roadways are split with a center median that features dual guardrails or concrete barriers. The thickness of your concrete patio will depend on the weight it will bear. Does the Autobahn have curves? $19.95. ", "Unfallstatistik: Auf Deutschlands Autobahnen wird es gefhrlicher(Crash Statistics: German autobahns more dangerous)", "Unfallentwicklung auf deutschen Straen 2012 (Crashes on German Roads 2012)", "A 95: Polizei geschockt ber "immenses Tempo" [Translation: A 95: Police Shocked at High Speed]", "International Traffic and Accident Data: Selected Risk Values for the Year 2012", "Speed Fact Sheet. They form a part of the German highway system; the plots of land are federal property. [93], In contrast to other road types, where the number of collisions has continuously decreased, the number of collisions on autobahns has remained relatively stable or even increased for several years since 2009. The result is 86.6 million ESALs, which is an increase from the original (10 inch) of 85%, or slightly less than two times the capacity. Concrete freeways are seldom "repaved". The motorway density in Germany is 36 kilometers per thousand square kilometer in 2016, close to that of the smaller countries nearby (Netherlands, Belgium, Luxembourg, Switzerland, Slovenia). That is pretty sick, great picture. What Is The Thickness Of An Asphalt Runway? - Airliners.net This means that the 1,250 miles to be. Where no general limit exists, the advisory speed limit is 130km/h (81mph), referred to in German as the Richtgeschwindigkeit. Selbst innerorts durfte gerast werden. Ironically. For travel by car, Germany's Autobahn system is one of the best highway systems in the world. Designing the road to coexist with nature was an innovative idea and reduces the impacts the Autobahn has on its surrounding environment. The highway system is called the Bundesautobahn (Bundes=fedral). [50] Automakers projected a 20% plunge in sales, which they attributed in part to the lowered speed limits. Freeze-resistant concrete allows drivers to continue to travel at high speeds even during cold winter months that generally make roads icy and unsafe. [37] "Free driving for free citizens" ("freie Fahrt fr freie Brger"), a slogan promoted by the German Auto Club since the 1970s,[38] is a popular slogan among those opposing autobahn speed restrictions. They have their own white-on-blue signs and numbering system. [64], Prior to German reunification in 1990, eastern German states focused on restrictive traffic regulation such as a 100km/h (62mph) autobahn speed limit and of 80km/h (50mph) on other rural roads. [100] On autobahns 22 people died per 1,000 injury crashes, a lower rate than the 29 deaths per 1,000 injury accidents on conventional rural roads, which in turn is five times higher than the risk on urban roadsspeeds are higher on rural roads and autobahns than urban roads, increasing the severity potential of a crash.[100]. The speed limit on the GDR autobahns was 100 kilometres per hour (62mph); however, lower speed limits were frequently encountered due to poor or quickly changing road conditions. After the Nazi dictatorship, German society was happy to overcome the traumas of war by freeing itself from most government restrictions, prohibitions and regulations. This still equals four calls per kilometre each year. And you will notice on the autobahns that, despite the freedom to drive as fast as you like, German drivers generally follow . Like really fast. As such, they are important German cultural identifiers, "often mentioned in hushed, reverential tones by motoring enthusiasts and looked at with a mix of awe and terror by outsiders. The soil type also affects how thick to pour concrete patio. F Company, 310th Infantry Regiment (United States) - Wikipedia Bereits im Oktober 2012 gab es hier einen schweren Unfall", "60 km/h erlaubte Hchstgeschwindigkeit auf der Autobahn 59", "Tempo 30: Es blitzt und blitzt an der Autobahn", "Grenzenlos das 250 km/h-Limit brckelt", "Die Sache mit der Geschwindigkeit Geschichte der Tempobeschraenkungen im Fuer und Wider Transport Research International Documentation TRID", "Verkehr und Klima: Rasen ohne Tempolimit", "Tempolimit: Freie Fahrt Wo geht das noch in Deutschland? My favorite aspect ofsynchrony on the Autobahn is a bridge for planes at the Leipzig Halle Airport where planes must taxi over the highway to access the runway. . MS-17 Asphalt Overlays for Highway and Street Rehabilitation. often have a maximum design speed of 62km/h (39mph) (usually denoted by a round black-on-white sign with "62" on it), along with flashing orange beacons to warn approaching cars that they are travelling slowly. In America, it rarely happens. When Germany was reunified in 1989, the Autobahns of East Germany were in virtually the same condition as they were in 1945, exhibiting the aforementioned qualities as well as mediocre signing, poor pavement, widely-spaced and often non-functional emergency telephones, and service areas consisting of a dilapidated roadhouse next to a short wayside. I think that in the future, engineers should look to the Autobahn as what can be done right when building highways and continue to move our transportation system into the future. You've got to know the thickness of the concrete slab if you want RH testing to give you the information you're looking for.