§ 154.135 GRADES.

   Streets must have a minimum grade of 0.5% and a maximum grade of no more than 6%.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.136 HORIZONTAL CURVES.

   Horizontal curves measured along street centerlines must comply with the following minimum radii.

   (A)   Major and secondary streets. The County Highway Engineer is authorized to establish the minimum radius of horizontal curves on major and secondary streets.

   (B)   Collector streets. Horizontal curves on collector streets must have minimum radius of 300 feet.

   (C)   Local streets. Horizontal curves on local streets must have minimum radius of 200 feet.

   (D)   Other streets. Horizontal curves on streets other than major, secondary, collector or local streets must have minimum radius of 150 feet.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.137 VERTICAL CURVES.

   Vertical curve lengths must comply with IDOT’s Bureau of Design & Environment Manual.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.138 REVERSE CURVES.

   A tangent of at least 100 feet in length must be introduced between reverse curves on local streets. A tangent of at least 300 feet in length must be introduced between reverse curves along all other (nonlocal) streets.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.139 PAVEMENT MATERIAL AND CONSTRUCTION.

   (A)   Asphalt pavement must comply with IDOT Standard Specifications for Road and Bridge Construction for bituminous concrete binder and surface course superpave and any special provisions applicable to IDOT District 1 standard requirements.

   (B)   All subdivisions must have pavement designed to the soil conditions actually found on the site in accordance with current IDOT design policy.

   (C)   Collector and local streets must comply with the cross sections of Appendix A. On major streets, secondary streets, county highways and developments intended for industrial or commercial use, projected traffic data and special uses must be submitted to the Chief Subdivision Engineer for evaluation, who has the authority to require additional width and thickness of pavements.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.140 COUNTY HIGHWAY ENTRANCES; CURB AND GUTTER AND ACCELERATION/DECELERATION LANES.

   County highway entrances must be constructed with curb and gutter returns and acceleration and deceleration lanes, as specified by the Chief Subdivision Engineer when proposed in conjunction with a subdivision, and must meet the requirements of the County Freeway and Highway Access Regulation Ordinance.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.141 GUARD RAILS.

   Steel plate beam guard rails must be installed in accordance with IDOT standards along the shoulder of any street where roadside hazards exist.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.142 STREET NAMES.

   Streets that are extensions of, or obviously in alignment with, existing streets must bear the name of the existing streets; however, no other streets may bear names that duplicate, or nearly duplicate so as to be confused with the names of existing streets, within the same township, fire protection district, police protection district. All street names must comply with the Street Numbering and Street Sign Ordinance and be approved by the County 9-1-1 Emergency Services office.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)

§ 154.143 STREET SIGNS.

   Street signs, identifying the street names shown on the approved final plat, must be provided at all intersections and as otherwise required by the applicable highway authority. Street signs must be installed in accordance with the Manual on Uniform Traffic Control Devices, published by the United States Department of Transportation (Federal Highway Administration). Street signs must be of a type approved by the applicable road authority and must be installed at the northeast corner of each intersection.

(Ord. passed 7-8-1970; Res. 09-167, passed 6-18-2009)