View source for Work Zone - 5.06 Traffic Signals

=5.06 Traffic Signals=
In most cases, temporary traffic signals for pedestrians will not be required but may be warranted where high volumes of pedestrians are expected.  A review of the pedestrian and/or school crossing warrants in the [https://mdotjboss.state.mi.us/TSSD/getCategoryDocuments.htm?categoryPrjNumbers=1403854,1403855&category=MMUTCD MMUTCD Part 4] is recommended.  

The pedestrian signal heads should be reviewed and adjusted if the crosswalk is being modified to meet MMUTCD requirements for visibility.  Pedestrian push button locations adjacent to level landing areas should be reviewed and updated to meet current standards. Locations of signalized temporary crosswalks with pushbuttons should be initially designed to work in all stages of construction.  It may be necessary to move the pushbuttons with each stage if the initial crosswalk location is moved.  

Adjustments for push button height should consider changes in the elevation of the level landing as temporary surfacing and final walkway surfacing is placed. 

If the crosswalks or ramps are modified, the signal timing permits should be reviewed and updated.  The pedestrian clearance intervals should be updated based on: 
* Crosswalk length 
* Level Landing location 
* Pushbutton location 
* Changes expected in pedestrian volumes 
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Temporary or permanent pedestrian traffic signals and pushbutton signs should be bagged when a crosswalk is closed.  The corresponding pushbutton to the bagged pedestrian traffic signal should be deactivated and the locator tone turned off. 

Temporary audible devices should be considered on a case-by- case basis for existing audible devices at crosswalks and where the proposed operation may be confusing to a person with a visual disability.  The  Pedestrian Signal Guidelines, found within the MDOT [https://mdotjboss.state.mi.us/TSSD/getSubCategoryDocuments.htm?prjNumber=1403878&category=Traffic%20Signals&subCategory=0-Operation%20Guides&subCategoryIndex=subcat1Traffic%20Signals&categoryPrjNumbers=1403877,1403878,1403879,1403880,1403881,1403882,1403883,1403884,1403885 Electronic Traffic Control Device Guidelines] should be reviewed to determine the need for audible pedestrian signals at existing signalized intersections within the work zone. 

==Categories==
* [[Work Zone - Chapter 5 | Chapter 5: Non-Motorized Work Zone Safety and Mobility]]
* [[Work Zone - Index | Work Zone Safety and Mobility Manual Index]]