There might be a danger or it might not be an area open to the public. If used at signalized intersections, with one-way streets, ONE WAY signs shall be placed near the appropriate signal faces, on the poles holding the traffic signals, on the mast arm or span wire holding the signals, or at the locations specified for unsignalized intersections. Where ONE WAY signs are used (see EPG 903.5.23), No Left Turn and No Right Turn signs may be omitted. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway so that traffic will have to pass to the right-hand side of the sign. RESERVED PARKING for Persons with Disabilities (DOUBLE ARROW) (R7-8D); Because the potential for conflicting commands could create driver confusion, STOP signs shall not be installed at intersections where traffic control signals are installed and operating except in the following cases: If used, these signs shall be placed at or between intersections to indicate where u-turns are prohibited. Where there are no parked cars, pedestrian activity or other obstructions such as snow or vegetation, and if an engineering study indicates that a lower mounting height would address wrong-way movements on freeway or expressway exit ramps, a DO NOT ENTER sign(s) and/or a WRONG WAY sign(s) that is located along the exit ramp facing a road user who is traveling in the wrong direction may be installed at a minimum mounting height of 3 ft., measured vertically from the bottom of the sign to the elevation of the near edge of the pavement. B. C. Stopping the direction that has the longest distance of uninterrupted flow approaching the intersection; and The DO NOT PASS sign may be used at the beginning of, and at intervals within, a zone through which sight distance is restricted or where other conditions make overtaking and passing inappropriate. 17. A. YIELD (R1-2) sign shall be utilized. The Left Only (R3-5L) sign shall be installed on the back side of the mast arms over the left turn lanes where practical. The No U-Turn sign shall be installed above the Authorized Emergency Vehicle Only sign. B. A. Supplemental plaques are not supported by MUTCD. As an alternate to the use of arrows to show designated restriction zones, word messages such as BEGIN, END, HERE TO CORNER, HERE TO ALLEY, THIS SIDE OF SIGN, or BETWEEN SIGNS may be used. B. If the zone is unusually long, signs showing a double arrow should be used at intermediate points within the zone. B. The earliest signs were simple wooden or stone milestones. Regulatory signs such as those shown in Figure 6F-3 inform road users of traffic laws or regulations and indicate the applicability of legal requirements that would not otherwise be apparent. Speed Limit signs indicating the statutory speed limits shall be installed at entrances to Missouri and at jurisdictional boundaries of metropolitan areas. REGULATORY SIGNS, BARRICADES, AND GATES Section 2B .01 Application of Regulatory Signs Standard: 01 Regulatory signs shall be used to inform road users of selected traffic laws or regulations and indicate the applicability of the legal requirements. The red Parking Prohibition sign and the green Permissive Parking sign may be combined to form an R7-200 sign on a single 24 in. A changeable message sign that displays to approaching drivers the speed at which they are traveling may be installed in conjunction with a Speed Limit sign. No items other than official traffic control signs, inventory stickers, sign installation dates, anti-vandalism stickers and bar codes shall be mounted on the backs of YIELD signs.