North America Canada concurrent with Highway 403 in Ontario Concurrencies are also found in Canada.
British Columbia Highway 5 continues east for concurrently with
Highway 1 and
Highway 97, through
Kamloops. This stretch of road, which carries Highway 97 south and Highway 5 north on the same roadway (and vice versa), is the only wrong-way concurrency in British Columbia. Concurrencies are also very common in
Quebec. Most notably, the
Samuel-de-Champlain Bridge features a concurrency with three Autoroutes:
A-10,
A-15, and
A-20. Another example is
A-55, which runs concurrently with A-10, A-20, and
A-40, all of which are major highways. In
Ontario, the
Queen Elizabeth Way and
Highway 403 run concurrently between
Burlington and
Oakville, forming the province's only concurrency between two
400-series highways. The concurrency was not in the original plan which intended for both the QEW and Highway 403 to run parallel to each other, as the Hamilton–Brantford and Mississauga sections of Highway 403 were initially planned to be linked up along a corridor (later planned to be
tolled) now occupied by
Highway 407. To avoid forcing drivers to pay tolls to use a section of a continuous Highway 403, the new link was designated as a western extension of the tolled Highway 407, with the Mississauga section of Highway 403 planned to be renumbered as Highway 410. The renumbering to 410 never came to pass, and consequently Highway 403 was signed concurrently along the Queen Elizabeth Way in 2002, remedying the discontinuity. Nonetheless, many surface street signs referring to that section of freeway with the QEW/Highway 403 concurrency still only use the highway's original designation of QEW, although the MTO has updated route markers on the QEW to reflect the concurrency. At the national level, the
Trans-Canada Highway, which does not bear a uniform number in the eastern provinces, follows various provincial highways. In the
Atlantic Provinces the main designated TCH route either follows a single numbered route across each province (an exception being the switching of the designation between
Nova Scotia Highways 104 and
105), or has branches that are signed exclusively as TCH routes. In Ontario and Quebec, The TCH follows a series of provincial highways, and also has branches that follow sections of others that have concurrencies with it, signed with TCH shields alongside the provincial number.
United States , where
I-40,
I-85 Business,
US 29,
US 70,
US 220, and
US 421 formerly ran concurrently In the United States, concurrencies are simply marked by placing signs for both routes on the same or adjacent posts. The federal
Manual on Uniform Traffic Control Devices prescribes that when mounting these adjacent signs together that the numbers will be arranged vertically or horizontally in order of precedence. The order to be used is
Interstate Highways,
U.S. Highways,
state highways, and finally
county roads, and within each class by increasing numerical value. Several states do not officially have any concurrencies, instead officially ending routes on each side of one. There are several circumstances where unusual concurrencies exist along state borders. One example occurs along the
Oklahoma–
Arkansas state line. At the northern end of this border
Oklahoma State Highway 20 runs concurrently with
Arkansas Highway 43 and the two highways run north–south along the boundary.
Europe Mainland Europe , Czechia In a majority of the countries in Europe, the
European routes are signed concurrently with national roads. Exceptions include Belgium, Norway, Sweden and Denmark where only European route numbers are used for those roads. Other exceptions include the United Kingdom and Albania, where European routes are not signed at all. In Sweden and Denmark, the most important highways use only the European route numbers that have cardinal directions. In Sweden the
European route E6 and
E20 run concurrently for . In Denmark the
E47 and
E55 run concurrently for . There are more shorter concurrencies. There are two stretches in Sweden and Denmark where three European routes run concurrently; these are E6, E20 and
E22 in Sweden, and E20, E47, and E55 in Denmark. Along all these concurrencies, all route numbers are posted with signs. In Czechia, the European route numbers are only additional, and they are always concurrent with the state route numbering, usually highways or first-class roads. In the state numbering system, concurrences exist only in first-class and second-class roads; third class roads do not have them. The local term for such concurrences is (from the French word ). In the road register, one of the roads is considered the main ("source") road and the others as the
péaging (guest) roads. The official road map enables a maximum of five concurrent routes of the intrastate numbering system. Cycling routes and hiking routes are often concurrent.
United Kingdom In the United Kingdom, national routes do not run concurrently with others. Where this would normally occur, the roadway takes the number of only one of the routes (usually, but not always, the most important route), while the other routes are considered to have a gap and are signed in brackets (the equivalent of "to" signs in North America). An example is the meeting of the
M60 and the
M62 northwest of
Manchester: the motorways coincide for the between junctions 12 and 18 but the motorway between those points is only designated as the M60 (although in this case the same junction numbers would also apply to the M62).
European route numbers as designated by
UNECE may have concurrencies (for instance
E15 and
E30 around
Greater London), but since the E-route numbers are unsigned and unused in the UK, the existence of these concurrencies is purely theoretical.
Middle East In Israel, two
freeways, the
Trans-Israel Highway (Highway 6) and
Highway 1, run concurrently just east of
Ben Shemen Interchange. The concurrency is officially designated "
Daniel Interchange", providing half of the possible interchange directions. It is a segment consisting of eight lanes providing high-speed access between the two highways. Access from Highway 1 west to Highway 6 south and Highway 6 north to Highway 1 east is provided via
Route 431, while access between Highway 1 east to Highway 6 north and Highway 6 south to Highway 1 west are provided at Ben Shemen Interchange. The other movements are provided through the concurrency. == Gallery ==