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The need to adopt measures to retain the mobility function of arterials and thus prevent them from becoming local roads. The fourth category can be divided into two distinct elements under the general heading of system additions: a. The need to complete the County system to provide continuity of arterial routes. The need to develop additional arterials in the contiguous urbanizing area both to support the State system and to increase the capacity of the County System. Figure 11 illustrates the County's needs within these four basic categories. Problems Presently the County is faced with a number of emerging problem areas. Basically these are due to: 1) the increase of traffic and, 2) the design of facilities without the foreknowledge of future development. For instance, a number of the interchanges located on Highway 10 are hampered by intense traffic generation from adjacent land developments which have direct access to the interchanges. Because of the diagonal nature of Highway 10 a number of County arterials were severed to enable the development of a relatively simple interchange. This, in addition to adjacent development, causes conflicts between the County arterial through traffic, the arterial traffic desiring to interchange with the freeway, and the traffic generated at nearby developments. The following problems are also apparent: Many of the County arterials are presently utilized as local and collector streets with substantial adjacent development having direct access to them. This results in: a. A reduction in capacity. b. A reduction in speed, c. A reduction in the attractiveness of the route. d. An increase in the roadside friction and consequent accident potential. The County arterial system in many instances, lacks continuity thereby decreasing its attractiveness to the longer trip length user by indirectness of route and increased travel time. 30 I I I I I ! I ! !