A6 highway (Lithuania)
The speed limit for most of the length of A6 is default 90 km/h (outside city limits). The section from Kaunas to Jonava has been upgraded to a dual carriageway with at-grade junctions and traffic-lights. The remaining sections are roads with one lane in each direction, leading through towns like Ukmergė, Utena and Zarasai.
Preston By-pass
The motorway was designed to be capable of handling vehicles at speeds of , a limit which is unchanged to this day; no speed limit was enforced for the first few years. Lancashire Police estimated that 2,300 cars were using the road each day within the first month of opening, which was considerably less than the road's capacity. During the early period of operation, drivers reported being apprehensive about using the motorway through fear of faster drivers overtaking them, with average speeds recorded as being around , despite police records for the month ending 23 May 1959 showing no vehicle being driven faster than . Shortly after opening, the motorway saw its first two minor incidents; each was as a result of inexperienced drivers (in one case, an underage driver) being unfamiliar with motorway driving and losing control of their vehicles.