Traffic Engineering

Traffic Signal Spacing Guidelines
Statewide, Maryland
MD State Highway Administration

Brudis & Associates, Inc. completed the development of a statewide policy and guide for signal spacing to optimize traffic flow on Maryland’s arterial highways.

The project included the examinations of the following five elements: traffic volumes; prevailing speed; signal distribution & queuing of traffic; and mid-block, unregulated access and highway driving traffic.

The objective of the guide was to evaluate the impact(s) on highway traffic along different levels of roadways, based upon variable spacing of traffic signal control points and to generate a guide for preferred spacing of new traffic signals.






Pedestrian Countdown Signal Study
Salisbury, Maryland
State Highway Administration – District 1

Brudis & Associates, Inc. conducted a detailed analysis to assist MSHA in the development of its pedestrian signal safety program. The study involved: “before/and after” studies which helped determine the effects of pedestrian countdown signals on reducing pedestrian/motor vehicle conflicts on marked crosswalks, the effect on driver and pedestrian behavior, and the overall performance of this type of device.


Advisory Speed Study
Statewide, Maryland
MD State Highway Administration

Brudis & Associates, Inc. completed an extensive statewide traffic study for the determination of Advisory Speeds on Maryland highways.

The BAI study on the posting of advisory speed has been referenced in AASHTO’s 4th Edition of “A policy on Geometric Design of Highway and Streets.” The study involved: traffic research; field testing, involving different types/sizes of vehicles; road friction evaluations; software for computer development and hardware for g-fore and vehicle lean measurements.




Acadia National Park Engineering Safety Study
Hancock, Maine
Federal Highway Administration – EFLHD

Brudis & Associates, Inc. completed a comprehensive Engineering Safety Study for the entire infrastructure of Acadia National Park, one of the Nation’s top 10 visited National Parks. The project included an assessment, inventory and documentation of nearly 100 road miles, pedestrian and hiking trails, 20 bridges and various roadway retaining walls in the National Park. The study included road evaluation and safety investigation; inventory and condition assessment; transportation planning; environmental considerations; traffic, accident and safety analysis; estimates of construction cost; bicycle and pedestrian trails; geometric evaluations; intelligent transportation system (ITS); improvements and safety recommendations for roads and infrastructure.