The 1968 Warsaw Treaty Organization (Warsaw Pact) invasion of Czechoslovakia generated a certain amount of disillusion that probably contributed to the increase, during the late 1960s, in attempts to emigrate illegally. An émigré reported that about 40 percent of the prison populations at Arad and Timisoara, or some 500 inmates, had failed in attempts to cross the border into Hungary. Most of them were reportedly twenty to thirty years old and were serving sentences of from one to five years. Modern crime-fighting facilities have been introduced more slowly than has been the case in the more prosperous European countries. During 1970 the Ministry of Justice established the Central Crime Laboratory and two branch, or interdistrict, laboratories. All of them serve the militia, the security and armed forces, the courts, and the public prosecutors. They are equipped to assist in the investigation of all aspects of crimes except those where medical and legal services are required. They include facilities for handwriting, fingerprint, and ballistic analyses and analysis of documents (for counterfeiting or alteration) and for performing a number of other physical and chemical tests. Traffic Control Traffic control demands a sizable portion of police energies, although by 1972 highway use remained low in comparison to the rest of the continent. There had been few motor vehicles before World War II, and numbers for personal use or for motor transport increased slowly during the immediate postwar years. Since about 1955, however, both categories have become available at an accelerated rate. In 1963 traffic was up over 200 percent (and in 1965 approximately 300 percent) from 1955 levels. Total numbers of vehicles increased at about 10 percent a year during the late 1960s, and the number of those that were privately licensed doubled during the two-year period 1968 and 1969. Encouraged by the government during approximately the same period, tourist traffic tripled. Irresponsible driving, lack of traffic controls, and lack of concern for their danger on the part of pedestrians, bicyclists, and wagon drivers contributed to an acceleration in the number of accidents and casualties that paralleled the increase in traffic. In 1969 there were 2,070 deaths resulting from about 5,300 reported accidents. Only about 40 percent of the victims were occupants of the vehicles involved and, of them, a considerably larger number of passengers than drivers were killed. Nearly 50 percent of the total fatalities were pedestrians; the remainder were on bicycles or wagons.