(A) When traffic lane is fully or partially obstructed by a maintenance or construction operation, a flagger or flaggers will not be required only when all of the following are met:
(1) The ADT of the given section of road is less than 400 vehicles per day. If the ADT is not on record at the Warrick Highway Engineering Department, the County Highway Engineer shall determine if this criterion is met, and:
(2) The work zone on any road (except a local residential street) must be more than 400 feet from an intersection. On local residential streets the work zone must be greater than 100 feet from an intersection, and;
(3) Motorists in both directions can see approaching motorists from the opposite direction with no sight obstruction. In order for a vehicle to stop, this means that the motorists shall have an unob- structed view from “d” feet from their end of the work zone to "d" feet from the far end of the work zone (where "d" = length of maximum # of cars in storage + distance required for driver to react + distance required for vehicle to stop), and:
Posted ** Speed | d (feet) * |
Posted ** Speed | d (feet) * |
20 | 310 |
25 | 370 |
30 | 430 |
35 | 495 |
40 | 555 |
45 | 615 |
50 | 670 |
55 | 755 |
* These shall be increased for wet pavement, gravel or on descending grades.
** Use 55 MPH if not posted.
*** These are guidelines based on the Handbook for Traffic Control - HERPICC, the Indiana Manual on Uniform Traffic Control Devices - 1988 IDOH and the Handbook of Traffic Control Practices for Low-Volume Roads in Indiana - HERPICC 1984. These are only guidelines and as specified in the manuals, good judgment should be used in determining when flaggers should be used but may not be required by these guidelines.
(4) The work activity does not create congestion or backup of more than five vehicles at any time.
(B) The work zone shall include all cones making the taper protecting the actual work area. Traffic control devices, placement of traffic control devices and requirements for flaggers (including clothing, procedures and locations) shall be detailed in the HERPICC - Handbook for Traffic Control in Construction and Maintenance Areas. A lane shall be considered partially obstructed when a ten-foot lane for each direction of traffic can be maintained.
(BC Ord. 1998-4, passed 5-11-98) Penalty, see § 92.99