PRE-RECOMMENDATION PROCEDURE

 

The following procedure must be followed to determine if speed humps should be recommended or rejected for implementation on a specific street as a measure to calm traffic:

 

To initiate an engineering study, the residents on the street where the speeds humps are being considered must document support for the installation of the speed humps from 25% of the households.

 

1.             The Transportation and Parking Office drafts a petition for the originator of the request  to circulate to households along the set boundaries being proposed for the implementation of speed humps.

 

2.             Check the validity of the petition.

 

If 25% of the households along the street where speed humps are being considered document support for installation, an engineering study of the street and surrounding street system will be conducted to determine if the area meets the Transportation and Parking OfficeÕs guidelines for speed hump installation.  If 25% the households along the street proposed for implementation do not support the installation of speed humps, the request is rejected and the process discontinued.

 

3.             Initiate an engineering study of the street proposed for speed hump implementation and the surrounding street system.

 

The Lansing Police and Fire Departments should evaluate a street for speed hump installation based on emergency vehicle routes on the specific street under study.  Streets that are designated as primary and or secondary fire / emergency routes will not be evaluated for speed hump installation. If either one of these departments is opposed to speed hump installation on the specified street, the request is rejected and the speed hump process is discontinued.

 

4.             Obtain the Lansing Police and Fire DepartmentÕs approval.

 

Engineering guidelines for the installation of speed humps dictate that the daily traffic volume on the street should be between 500 and 3,000 vehicles per day and that the 85th percentile speed should be 35 MPH or greater.  Speed humps should only be placed on roadways where the geometry presents a slope of less than 5%.  Furthermore, the street should not be a designated truck route.

 

5.             Determine if the street is designated as a truck route.

 

A detailed pre-installation study should be conducted and include the directional 85th percentile speeds at each proposed speed hump location and between each of these locations.  Traffic volume and speed data should also be gathered on adjacent streets that may carry diverted traffic if the speed hump are installed.

 

6.             Conduct a study of the area traffic volumes, speeds, and roadway characteristics.  Evaluate how speed hump implementation will impact the local street network.

 

If the specified street satisfies the Transportation and Parking Office guidelines and the surrounding street system will not be greatly impacted, then an engineer will design a layout for speed hump(s) installation.  If the specified street does not satisfy the Transportation and Parking Office guidelines, then the request is rejected and the speed hump process discontinued, unless at this juncture, the residents wish to pursue the option of special assessment if area support is still present.

 

7.             Design and draft a speed hump plan or layout.

 

If a majority (51%) of the households along the specified street document support for the installation of speed humps, the Transportation and Parking Office will implement portable speed humps on a trial basis of at least 90 days in order to evaluate new traffic patterns and to allow the residents to observe the operation of these traffic calming measures in actual field conditions.

 

8.             Install portable speed humps on a temporary basis.

 

This procedure should be followed to determine if the speed humps should remain at their specified locations on a permanent basis.

 

A post installation study should be conducted to determine the effectiveness of the speed humps after they have been installed for 90 days.  This study should include the directional 85th percentile speeds at each hump and between each hump.  Traffic volume and speed data should be gathered on adjacent streets that may be carrying diverted traffic as a result of the speed hump installations.   

 

9.             Conduct a detailed post-installation study.

 

10.          Evaluate the effectiveness of the speed humps in reducing vehicular speeds and/or traffic volume.

 

11.          Determine if the traffic is being diverted to adjacent side streets.

 

At this point, an informational meeting should be held to provide the area residents with traffic and design information. This meeting should allow the residents and property owners to express their support for the installation of permanent speed humps or to recommend that the temporary speed humps be removed and that this traffic calming measure be no longer considered.  The Traffic Board and the Committee on Public Safety should be informed of this meeting.

12.          Hold informational meeting with residents along the specified street.

Using input from the Lansing Police and Fire Departments, cost information, daily traffic volume, 85th percentile speed, truck route designation and input from residents along the specified street, the Transportation and Parking Office will develop a recommendation.

 

If 65% of the households along the street where speed humps are being considered document support for permanent installation, the Transportation and Parking Office will make a positive recommendation to the Traffic Board.  However, if the households along the street proposed for implementation do not document 65% support for the installation of speed humps, the request will be forwarded to the Traffic Board with a neutral recommendation.  At this stage, the property ownerÕs position on speed hump implementation will take precedence of over that of the residents.

 

13.          Send recommendation to the Traffic Board.

 

14.          Send Traffic Board recommendation to the Mayor.

 

15.          The Mayor reviews the recommendation and refers the item to the City Council.

 

16.          The City Council refers the item to the Committee on Public Safety.

 

17.          The Committee on Public Safety reviews the item and makes a recommendation to the City Council.

 

18.          The recommendation is brought before the City Council for a full vote.

 

If the Council approves the recommendation, the Transportation and Parking Office begins the post-recommendation procedure, otherwise, the process is discontinued. 

                                                                                   

POST-RECOMMENDATION PROCEDURE

 

The following procedure must be followed to construct the recommended permanent speed humps.

 

The speed hump must be 14 feet long, three (3) to four (4) inches high and follow the attached speed hump profile that has been endorsed by the Transportation and Parking Office for construction.

 

19.          Construct the speed humps (including pavement markings and signs).

 

 

REMOVAL PROCEDURE

 

The following procedure must be followed to determine if the existing speed humps should be removed:

 

If a group of the residents along the street where the speed humps were installed support the removal of the speed humps, they may submit a request for removal.

 

20.          The Transportation and Parking Office will draft a petition to be circulated by the concerned person(s) to request removal of the permanent speed humps.

 

21.          Check the validity of the petition.

 

If 65% of the households along the street where the speed humps were installed support the removal of the traffic calming measures, the process continues, otherwise, the request is rejected and the process is discontinued. 

 

22.          The Transportation and Parking Office submits a recommendation to the City Council for removal of the speed humps.

 

If the Council approves the recommendation the process continues, otherwise, the process is discontinued.

 

The following procedure must be followed to remove speed humps.

 

23.          Remove the speed humps.

 

24.          Repair/re-pave the roadway to its original condition prior to speed hump installation.

 

 

 

 

 

 

 

 

 

 

 

                                                                                   

 

 

 

 

 

 

 

 

SPEED HUMP PROFILE