In any new subdivision the street layout shall conform to the
arrangement width and location of streets as indicated on the Village
of Harristown Official Map, Comprehensive Plan, or the neighborhood
development plan which was drawn up as part of the preapplication
review. The overall plan in addition should conform to the following
standards:
(A) In general, not more than 20% of the total land area of the subdivision
should be in street right-of-way.
(B) The resulting street pattern should be properly related to topography
and other natural features for aesthetic and drainage reasons. Further,
the system should be so designed as to allow economic platting of
the best building sites possible.
(C) The overall plan should result in proper functional classification
of streets, with spacing of collector and major streets in accordance
with standards contained in this section.
(D) The street system should afford satisfactory access to a public street
to all building lots within the subdivision and provide the advantageous
street service up to all adjoining lands.
Street alignment shall be so laid out so as to insure public
safety and convenience for both vehicular and pedestrian travel. The
following standard shall be followed in the alignment of streets.
(A) The number of intersections shall be kept to the absolute minimum
necessary to provide reasonable direct traffic flow. No more than
two streets shall converge at any one intersection. The intersection
of streets shall be as near 90% as possible, never less than 70%.
(B) Street jogs shall be discouraged and should never be permitted with
center-line offset of less than 150 feet.
(C) Reverse curves of major and collector streets shall not have tangents
of less than 100 feet.
(D) The number of access points shall be reduced as the functional classification
of the street increases and as travel volume and speed increases.
The design of streets shall relate to their function classification, surrounding development density and topography. Major streets shall be designed in accordance with anticipated traffic flow and desired speed of movement, all major widths and standards of construction shall be separately approved by the Village Board after recommendation of the Village Plan Commission and Engineer. The design of the residential streets and collector streets should conform to the standards of
Table VI-I and the general standards contained in this Section related to such streets.
Local streets shall be designed in accordance with
Table VI-I. The function of local streets is to provide direct access
to individual lots. The travel speed should be slow enough to minimize
hazards to children and entering traffic (less than 30 miles per hour).
The following standards shall relate to local streets:
(A) Local streets shall be so laid out that through traffic is discouraged.
(B) Local streets should be kept as short as possible and connect as
directly as possible into a collector street.
Collector streets shall be designed and laid out in accordance to
Table VI-I. The function of collector streets is to collect local traffic and move it conveniently and directly to the nearest major streets or neighborhood facilities (schools, churches, shopping, etc.). The access to a collector street should be limited to local streets. The design travel speed for collector streets shall be between 30 and 40 miles an hour. The specific requirements are as follows:
(A) Collectors should be spaced approximately 1/4 mile apart.
(B) Residential driveways generally should not be allowed to enter directly
onto collector streets.
(C) Collector streets shall be provided with ten-foot crosswalks at reasonable
intervals.
(D) Setback on all collector streets shall be increased over minimum
zoning district setbacks in relation to the traffic volume anticipated.
(E) Four-foot sidewalks shall be required at least on one side of urban
collector streets, and where required by the corporate authority may
be required on both sides.
(F) Where parking and driveway entrances are necessary along collector
streets the pavement width shall not be less than 40 feet. Where no
lots face collector streets, the pavement width may be reduced to
36 feet or less, depending on the density of adjoining development.
(G) Access controls may be required on highly traveled collectors.
Major streets shall be designed in accordance to standards established
at time of platting. All major streets shall be not less than 80 eighty-foot
rights-of-way nor less than forty-eight-foot pavement. Additional
width of parkways shall be required adjacent to residential areas
and on major entry ways to the Village. The pavement shall be concrete.
Sidewalks and curbs shall be provided on all major streets within
one mile of Village all the standards shall apply to major streets
unless waived by the Village Plan Commission and Village Board.
(A) The access to major streets shall be strictly controlled. No single-family
residential drive shall enter directly into a major street.
(B) Streets entering major streets shall be limited to one-fourth-mile
intervals.
(C) Major streets shall be spaced at on- mile intervals within the built-up
urban area.
(D) Provisions shall be made for vehicular and pedestrian access to residential
property abutting major streets either by provisions (1) marginal
access streets, or (2) by backing lots to the major street and providing
access by a collector, minor, or cul-de-sac street one lot depth removed
and with a visual barrier established in a non-access reservation
strip along the rear property line (abutting the major street). These
standards are established for the purpose of providing protection
to residential properties and to separate through and local traffic.
The specific method used shall be determined by the Village Plan Commission
in the preapplication review.
(E) All major streets shall have constructed with access control rights
granted to the Village and in commercial areas joint frontage road
or shared access points may be required.
(F) All new subdivisions along limited access collector and limited access
major streets shall be arranged to provide access to such highways
at intervals not less than one-fourth-mile intervals, except where
impractical or impossible due to existing property divisions or topography.
There shall be no other access to a limited access major street or
a limited access collector street except as noted above. Also, roads
and streets within such subdivision shall be arranged to permit access
to adjacent future subdivisions without encroachment upon this regulation.
(G) Commercial and industrial subdivisions along major streets shall
be responsible for special traffic improvements to adjacent major
streets. Such improvement shall be as required by the Village Board
after recommendations by the Village Engineer.
At times special roadway types, such as, scenic drives, industrial
roads, freeways, half streets, marginal access and frontage roads
may be necessary. The following requirements govern such situations.
(A) Freeways. Whenever a freeway, railroad track, or expressway passes
through or adjacent to a proposed subdivision, the Plat Officer may
require a street approximately parallel to and on each side of such
right-of-way, at a distance suitable for the appropriate use of the
intervening land, as for park purposes in residential districts, or
for commercial or industrial purposes in appropriate districts. Such
distances shall also be determined with due regard for the requirements
of approach grades and future grade separations.
(B) Marginal access road. Marginal access roads should have twenty-four-foot
widths with sidewalks on the development side and curb and gutter
where deemed necessary.
(C) Cul-de-sac streets. Designed to have one end permanently closed shall
not exceed 1,000 feet in length. All cul-de-sac streets designed to
have one end permanently closed shall terminate in a circular turnaround
having a minimum outside curb radius of 40 feet.
(D) Half streets. In general, half streets should be avoided, but where
they are essential a minimum pavement surface of 20 feet in width
shall be constructed with both curb and sidewalk on the development
side.
(E) Reserve strips. Reserve ("spite" or "devil") strips controlling access
to streets shall not be permitted. Streets roughly paralleling the
subdivision boundary shall be located not less than one lot depth
from said boundary. All streets intended to provide the subdivision
with future means of ingress and egress shall extend to the subdivision
boundary.
(F) Streets in floodplains. Elevations of collector or major streets
passing through flood areas shall be at least two feet above the one-hundred-year
recurrence interval flood local and shall be designed to have minimum
adverse effect upon flood flows or velocities. All local streets,
other than parkways, shall be two feet above the fifty-year flood
level.
(G) Private roads prohibited. Private roads and streets shall be permitted
only when the subdivider submits sufficient evidence to the Committee
that there can be no public interest in such private road or street.
(H) Alleys and pedestrianways.
(1)
Alleys shall be at least 16 feet side, where permitted, in residential
areas. Alleys at least 22 feet wide shall be provided in commercial
areas unless such areas are otherwise provided with off-street loading
space.
(2)
Pedestrianways shall be at least 12 feet wide, where permitted,
and a four-foot chain-link fence with a top rail shall be installed
at side boundary lines to within 12 feet of street or alley lines.
(3)
Dead end alleys shall not be allowed.