Median Acceleration Lanes a Mixed Bag

Guest Post by Max Moreland, PE, Director of Operations at Traffic Data Inc. Median Acceleration Lanes (MALs) are just what they sound like – an acceleration lane on the inside median. MALs are intended to allow left turning vehicles from the side streets, or U-turning vehicles on the mainline, to complete their turn without needing […]

Removing a Left Turn Lane to Provide for a Bike Lane

Bicyclist. It is a word that can incite frustration in the minds of both drivers and traffic engineers alike. But, let’s face it: bicycles are good for the environment, they are cost-effective, they are good for our collective and individual health, and the presence of cyclists within a community creates a positive image that says […]

Case Study: Iterating an Event Traffic Study at a Buddhist Temple

This article was originally published in 2015, but has been updated with additional information. We would love to hear from our readers on their traffic study experiences for event traffic. Post your comment or write us at We were hired to conduct a “traffic study” for a minor expansion to a Buddhist Temple.  The […]

Crash Analysis: Corridor Crash Rates

Guest post by Jonah Finkelstein, EIT Spack Consulting With the general crash definitions discussed in Crash Analysis Definitions, and the process and tools used to conduct an Intersection analysis reviewed in Crash Analysis: Intersection Crash Rates, we can now look into Minnesota Department of Transportation’s (MnDOT’s) tool for corridor crashes known as the Section Green […]

The AASHTO SPaT Challenge

Guest post by Jacob Rojer, EIT Spack Consulting Autonomous vehicles and driver assist features have become increasingly popular in recent years. There are three main dimensions of automated vehicles: driving automation & driver assistance, vehicle to vehicle (V2V) connectivity, and vehicle to infrastructure (V2I) connectivity. I recently attended a North Central Institute of Transportation Engineers […]

Exploring Alternative Intersections

Guest Post by Bryant Ficek, PE, PTOE, Vice President at Spack Consulting. For many of our studies, stop signs, traffic signals, and roundabouts supply the necessary capacity and acceptable operations. Sometimes, though, we handle projects that require innovative thinking and lead us toward consideration of alternative intersections. Alternative in this case being defined as not traditional […]

New HCM Methodology for Work Zone Alternatives

Applying Capacity Reductions to Account for the Effects of Work Zones

One of the more significant additions to the new 6th Edition of the Highway Capacity Manual (HCM) are equations to account for the effects of work zones.  Based on NCHRP Report 03-107, reduction factors have been developed to reduce capacity, free flow speed, and saturation flow rates in four of the analysis modules. Several state […]

New Traffic Corner Tuesday Webinar Schedule

Last fall we introduced a new webinar series called Traffic Corner Tuesday. These free, 30-minute webinars are held by our senior engineering team and focus on sharing our traffic engineering best practices. The fall sessions were so popular that we have released a new schedule of webinars for 2017.  Join Bryant Ficek, PE, PTOE, Vice […]

Parking Case Study: Data Collection to Right Size Parking Lots

Savvy retail property owners are realizing many of their parking lots are too big and going unused.  One such property owner is Windamere, who hired our sister company Spack Consulting to assist them with determining how they could redevelop the Southdale Office Centre with additional buildings. In the past, we’d go through the laborious process […]

City of Albuquerque Tests Walkability Improvement

Over the past ten years, there has been a renewed interest in urban revitalization by many cities. The goal is to drive new economic opportunities in the heart of their downtown areas. At the same time, this renewed interest in the downtown areas has challenged the previous “auto-centric” design of the transportation systems that focused […]