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In terms of vehicle km all traffic increased by 36 per cent over the decade 1986–
96, with cars and taxi traffic rising by 37 per cent. In 1996 there were 21.17 million
private cars registered in Great Britain, and trips made by car drivers and their
passengers accounted for 84.7 per cent of all journeys made by road and rail transport
(Tables 6.7, 6.8). There has also been a 32 per cent rise since 1986 in the average
distance travelled by car by each person per year, whereas the distances covered by
bus, motorcycle and cycle have all fallen. Data from the 1993/5 National Travel Survey
also indicates that car travel now accounts for 81 per cent of all road traffic and for 94
per cent of all national passenger traffic. Large increases have also taken place in
road freight transport, with a 46 per cent rise in the amount of roadborne freight
traffic since 1986 and a 30 per cent increase in the distance travelled by commercial
vehicles.
These increased flows are carried on an infrastructure which has been progressively
improved in terms of new and upgraded trunk and principal roads, but congestion remains
a serious problem on both urban and national highways. The rate of motorway construction
has gradually declined since the ambitious building programmes of the 1960s and 1970s,
and in the 1986–96 decade only 306 km were added. Completion of the M40 between
London and the M42 orbital road around Birmingham in the early 1990s marked the end
of the major phase of inter-urban motorway building and recent additions have been
confined to branches linking towns to the national system (Figure 6.2). Motorways now
account for 20 per cent of the national trunk road network, but by 1996 just over a half of
all trunk road traffic was making use of them (Table 6.9).
Motorway traffic is still frequently impeded by chronic congestion however,
especially on the approaches to London, on the M25 and on the M6 around Birmingham,
and there is now ample evidence that the major road investment programme published
in 1989 will not meet the demands of traffic levels in the twenty-first century (Department
of Transport 1989). In early 1994, however, it was announced that forty-nine of the
major road schemes contained in this programme were to be abandoned and 242 further
projects were to be suspended as part of a new policy initiative designed to encourage
the use of alternative means of transport and reduce road-building expenditure. The
inadequacy of the existing road network was admitted by the Department of Transport
in evidence to the Royal Commission on Environmental Pollution in 1996, and since
1993 the government has been actively encouraging the involvement of the private
sector in new road construction and, where appropriate, operation and maintenance
(Department of Transport 1993). To date the only significant results of private investment
have been the Queen Elizabeth II bridge carrying the M25 over the Thames to supplement
the capacity of the earlier tunnel, and the second bridge over the Severn, opened in
mid-1996 and linked with the M4-M5 motorway network in this area. In the early 1990s
it was proposed that a 43-km privately funded toll road to relieve congestion on the
Birmingham section of the M6 should be built to the north of the conurbation as a
three-lane motorway. Traffic volumes of up to 50,000 vehicles per day were forecast
and could yield a daily income of £100,000. This route is still under consideration, but
if completed it would be the longest privately financed road in the United Kingdom.
The summer 1998 White Paper on transport indicates that efforts to expand privately
funded and operated toll roads will be continued, but it is unlikely that such routes will
provide an effective solution to congestion. Proposals for the introduction of tolls on