SR-125 Road and Storm Drain Condition Evaluation

 General, GIS, Infrastructure Management, Planning  Comments Off on SR-125 Road and Storm Drain Condition Evaluation
Feb 152012
 

Opened in 2007, the State Route (SR) 125 toll road is approximately 10 miles long and extends from HWY 54 to I-905 in the City of Chula Vista, San Diego County, California. The city of Chula Vista witnessed rapid growth in housing development during the housing boom of the mid-2000s. An estimated 30,000 residential, commercial, and other parcel units were slated for development in this region. The SR-125 toll road, which was privately operated by South Bay Expressway (SBX), was created to accommodate this rapid expansion.

However, the economic slowdown of 2008 arrived and hit boom towns like Chula Vista particularly hard. Ridership and revenue projections made during the boom cycle fell short under the reality of recession. On July 29, 2011, the San Diego Association of Governments (SANDAG) voted to purchase the lease from SBX for about $345 million with various contingencies. (http://www.sandag.org/index.asp?newsid=698&fuseaction=news.detail)

VanderHawk Consulting LLC was contracted to perform a condition assessment of the road pavement and storm drainage systems on the SR-125 toll road and report the findings. The road pavement condition assessment was performed in accordance with the MicroPAVER pavement management protocol, while the storm drainage assessment was performed in a manner consistent with CalTrans’ storm drainage system evaluation procedures.  Almost 1,400 images (many geo-tagged) were captured for this project and comprise the most extensive analytical photo archive of the SR-125 toll road and drainage networks to date.

May 232011
 

Spent the morning with the family in beautiful San Clemente, California.  Avenida Del Mar is a main village attraction and draws people to it with its many unique shops, Spanish colonial architecture, and pedestrian-friendly environment.  The people there are some of the friendliest you’ll meet anywhere.  Community leaders and businesses are very much into promoting a more vibrant downtown village experience and they realize that fostering a pedestrian-friendly, or “walkable” environment is an important factor.

*All photos copyright Vanderhawk Consulting LLC

Using GIS to Prioritize Sidewalk Installation and Repairs

 GIS, Infrastructure Management, Risk Management, Uncategorized, Walkability/ADA  Comments Off on Using GIS to Prioritize Sidewalk Installation and Repairs
Mar 212011
 

Sidewalk Installation Priority Map

So, you’re a public agency trying to improve the walkability of your community and you know you have a bunch of missing sidewalks.  You may have even gone through the process of identifying where the sidewalks are missing, how much you need to install, and how much it will cost.  If you are like most other agencies, you don’t have the resources to fix all your problems at once.  You need to establish a prioritization system that is credible and defendable…and one that will  maximize your available resources.

The example above shows the result of using ArcGIS to calculate sidewalk installation priority for the City of Rancho Cucamonga based on a number of factors.  These factors included various locations such as senior centers, bus stops, schools, and parks; and weighted the missing sidewalk links based on their proximity to these locations.  The number of riders at each bus stop were also taken into account.

Locations such as senior centers and bus stops were given the highest value due to liability concerns related to potential trip/fall accidents and the fact that most people who utilize public bus transit walk to the bus stop.  Yes, there are those who bike (or use a wheelchair) to get to the bus stop, but it is safe to assume that folks aren’t getting dropped off at the bus stop by a car- that would be somewhat contradictory.

Those segments that have the highest priority are shown in red, while those with the lowest priority are shown in blue.  Bus stops (hollow circles) and schools (pink polygons) were added for effect…adding the other feature classes takes away from the priority ranks symbology.

Current estimates show that about $7-$10 million is required to install sidewalks at all missing locations.  This cost will likely be spread out over a period of time, such as 10 years; with higher-priority segments being installed first.  Some interesting notes about this GIS utility are that it can take into account multiple other locations and can also be used to prioritize other municipal operations, such as trip/fall hazard repairs.