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effect on the useability of certain properties would exceed the costs of design -based alternatives that utilize less right-of-way. Therefore, there may be some situations where alternatives (such as #7) would be more equitable and less expensive than full right-of-way acquisition. D. Policies to Reduce or Shift Right-of-way Needs ALTERNATIVE' #7 Utilize curb and gutter drainage with exfiltration or retention pond systems to reduce right-of-way needs. These types of drainage systems could require 20-30 feet less right-of-way width, because swales would not be used to retain and discharge stormwater. However, these types of improvements are expensive. In areas where soils are not suitable for exfiltration systems, swale or retention pond systems would have to be used, requiring acquisition of full amounts of right-of-way. ALTERNATIVE #8 Re-classify and down zone areas directly served by thoroughfares, to reduce potential traffic, utility, and drainage demands and thereby reduce right-of-way needs. The Thoroughfare Plan is designed to serve the projected growth of the County as set forth in the Comprehensive Plan. Restrictions on growth and development could result in the need for less infrastructure and right-of-way. However, such a drastic change in the land use plan or zoning districts could have a variety of adverse impacts. Such a change could reduce the market and assessed value of properties, could force changes in development plans and proposals within the public and private sector, could decrease the projected user -base of County water and sewer utilities, and could decrease the future amount of affordable housing. In effect, this alternative would limit the potential development of many areas in the county. In areas where additional right-of-way is needed for street, drainage, or utility improvements, no such services could be efficiently provided. Service problems would likely persist, and growth would be either impossible or costly to accommodate without deterioration of existing traffic levels of service. ALTERNATIVE #9 Amend the Thoroughfare Plan so that the higher class roads are situated in corridors with the greatest existing right-of-way widths and with the least expensive right-of-way acquisition opportunities. The Thoroughfare Plan works as whole; changing one aspect of the plan changes the traffic characteristics of the whole plan. For example, designating either 16th Street* or 8th Street as a primary collector rather than 12th Street, could adversely impact the plans for the south county area. Using 16th Street as a primary collector is infeasible because of severe right-of-way constraints along its western segment. It is also not a through street, being off -set at 58th Avenue. Using 8th Street as a primary collector would move a major collector further away from the urbanized area close to the city, and would be close to 4th Street, a primary collector designed to connect to the southern extension of Indian River Boulevard. Also, sufficient right-of-way has already been acquired within many thoroughfares, in accordance with the existing Thoroughfare Plan. Thus changes may not take advantage of right-of-way already acquired and aligned for the presently designated collectors. 15 OCT 3 11985 600K04 PA E 601