General Notes - Section C
Traffic Control Devices - Channelizing Devices
C-1. Cones shall only be used during short-term operations. All channelizing devices shall be retroreflective when used during nighttime operations.
C-2. Direction Indicator Barricades may be used for all tapers approaching a work zone. Utilization is recommended on tapers approaching work zones on freeways and expressways.
C-3. Channelizing devices may be substituted for temporary longitudinal edge line pavement markings shown on any PATA 200 or 500 series drawing. If channelizing devices are used in place of longitudinal edge lines, they shall be spaced at a distance (in feet) equal to the regulatory speed limit; for example a 45 MPH speed limit requires 45' spacing. Channelizing devices cannot be substituted for taper edge line pavement markings.
C-4. Channelizing devices placed along a conventional highway centerline should be placed on the same side of the double yellow line as the work space, thereby reducing the impact to motorists traveling on the opposite side of the roadway. When the type of work requires devices to be placed on or along the opposite side of a centerline or lane line, ensure that minimum lane width of 10' is provided.
C-5. Tapers within a lane shall utilize a minimum of 6 channelizing devices, however, more may be required based upon the regulatory speed limit and lane width. Shoulder tapers consisting of 6 channelizing devices are required when closing paved shoulders that have a width of 8' or more. Shoulder tapers are optional when closing unpaved shoulders or those less than 8' in width.
C-6. Barricades and vertical panels with stripes shall have alternating orange and white retroreflective stripes sloping downward at an angle of 45 degrees in the direction vehicular traffic is to pass.
C-7. Channelizing devices used to form a taper or longitudinal line must be all of a single type and identical in size and appearance. For example, cones, drums, barricades, and vertical panels may not be intermixed within the same taper or longitudinal line, however, the type of device used in a taper may differ from the type of device used in a longitudinal line.
C-8. Trailer mounted equipment such as speed display trailers, portable changeable message signs, etc. located on the shoulder or within the clear zone must be delineated with channelizing devices. Drums are the most preferred channelizer for delineation because they are highly visible, have good target value, give the appearance of being formidable obstacles and, therefore, command the respect of road users. Also, drums are generally used in situations where they will remain in place for a prolonged period of time. If the trailer is located behind barrier then delineation is not required. Refer to PATA 009 for further guidance.