General Notes - Section A
A-1. Not Used.
A-2. Distances shown in this publication are minimum standards and may be increased slightly to fit field conditions. Do not increase distances labeled as a maximum distance. Channelizing device spacing intervals should be maintained as shown on PATA drawings and spacing charts.
A-3. It is essential to satisfy the needs and control of all highway users (including motorists, bicyclists, pedestrians, and persons with disabilities in accordance with the Americans with Disabilities Act of 1990) traveling through the work zone. This also applies to the management of traffic incidents.
A-4. When existing pedestrian facilities are disrupted, closed, or relocated, the temporary facilities shall be detectable and include accessibility features consistent with those present in the existing facility. Sidewalk widths must be 60" minimum; however the width may be reduced to 48" if 60"x60" passing areas are provided every 200'. The accessible path must be 48" minimum. Both permanent and temporary pedestrian facilities must provide access to persons with disabilities.
A-5. Do not perform work over lanes open to live traffic unless expressly authorized by the District Traffic Engineer. Work taking place on maintenance platforms, catwalks, open boom trucks, etc., requires closure of the lane or lanes immediately below. This restriction does not apply to work within an enclosed environment such as inside a walk-in permanent dynamic message sign.
A-6. All detours involving state-designated highways shall have the prior approval of PennDOT. All detours involving local highways shall have the prior approval of the appropriate local authorities.
A-7. Temporary pavement markings are not required for short-term and mobile operations. When temporary pavement markings are placed, all existing pavement markings and raised pavement marker lenses that conflict with the temporary traffic pattern shall be removed. Temporary pavement markings shall be removed when the permanent markings are reinstalled.
A-8. All workers engaged in or entering into any field operation involving maintenance, construction, design, surveying, inspection, traffic studies, etc. and/or are exposed to moving vehicles and equipment are required to wear hard hats meeting ANSI Type II requirements and high-visibility vests, t-shirts or sweatshirts which meet the ANSI Class 2 or 3 safety garment requirements. A raincoat or jacket which meets ANSI Class 2 or 3 safety garment requirements may be worn during inclement weather. Furthermore:
- All visitors and others present on a work site in an official capacity must comply with the requirements detailed above.
- PennDOT employees shall refer to Publication 445, Safety Policy Manual, and any applicable PennDOT memoranda regarding Personal Protective Equipment (PPE) and work attire.
- Emergency and incident responders and law enforcement personnel within the temporary traffic control (TTC) zone should wear high-visibility public safety vests that meet the performance requirements of the ANSI/ISEA 207-2011 (see MUTCD, Section 1A.11), or equivalent revisions.
A-9.Authorized vehicles as defined in Title 75, Section 102 (Pennsylvania Consolidated Statutes), are approved to be equipped with flashing or revolving yellow warning lights. Authorized vehicles include shadow vehicles, work vehicles, private escort vehicles, etc. Lights must be activated when the vehicle is used in conjunction with an active operation. White flashing or revolving lights are only authorized to be mounted on emergency vehicles as per The Pennsylvania Code, Chapter 173. Emergency vehicles are those operated by state and local police, fire departments, etc.
A-10. Parking may be prohibited along conventional highways in conjunction with road work. Coordinate with local authorities to request temporary parking prohibition signing and enforcement. Parking is prohibited by statute on all limited access highwaysincluding entrance and exit ramps.
A-11. For all construction projects involving road work, a temporary traffic control (TTC) plan must be included or PATA drawings must be referenced to address temporary traffic control. Existing traffic signals within the work zone andalong detour routes, if any, may require timing and/or phasing modifications to accommodate temporary traffic patterns. The primary contractor is responsible to submit a letter to the District Traffic Engineer to either confirm thatexisting traffic signal timing is adequate to control temporary traffic patterns without a significant decrease in the level of service, or that traffic signal timings will require modification to maintain acceptable levels of service. This lettershall be received prior to placing lane restrictions. A copy of the capacity analysis report may be requested by the District Traffic Engineer. The contractor is required to abide by the temporary signal permit process prior to beginning work if signal modifications are recommended by the District Traffic Unit. Refer to Publication 46, Chapter 12, and Publication 149, Chapter 14.
A-12. Mobile operations (PATA 300 and 600 Series) that occupy a travel lane shall proceed in the direction of normal traffic flow. Mobile operations taking place off of the roadway shall proceed in the same direction as the nearest lane of traffic flow.