Transit and Transportation

The iDesign team has extensive experience in design of highways and roadways according to AASHTO standards and criteria. Our senior staff have designed and managed many roadway projects for Maryland SHA, Montgomery County, Howard County, and Baltimore City, including development of new roadways, widening of existing roadways, intersection improvements and ADA upgrades. We also provide planning and design for multi-modal transportation facilities, including transit centers, rail yards, and marine terminals.

US 29 Bus Rapid Transit

Montgomery County, MD

Dr. Shi incroporated several innovative methods to provide drainage and stormwater management at 15 condensed sites for this new rapid transit system.

Site and Safety Improvements at Landover Bus Yard

Landover, MD

The iDesign team provided pavement, traffic, utility and pedestrian safety design for this major bus depot, and increased bus capacity by ten vehicles.

Flood Prevention Investigations

METRO Stations

Mr. Abel led teams investigating stormwater intrusion into station platforms and mechanical rooms and provided detailed reports with maintenance and rehabilitation recommendations.

Track Fueling Pollution Control

Shady Grove, MD and Alexandria, VA

The iDesign team provided plan, profile and hydraulic design for new oil-water separators in several of METRO's train yards.

Highway Design

Highway design on the East Coast has rapidly grown from geometrics and drainage to requiring a complete understanding interconnections, jurisdictional oversight, and of course the introduction of 3D modelling. The iDesign team is continually immersed in highway projects throughout their lifecycle and ready to take on challenging new tasks.

I-270 Innovative Congestion Management Design-Build

Montgomery and Frederick County, MD

Our team design 6 of 14 ramp geometric improvements for this groundbreaking design-build, including ramp dualizations and extensions to acceleration lanes. We also provided site design for all ramp metering locations.

Old Joppa Road Bridge over I-95

Joppa, MD

iDesign prepared all non-structural design for the replacement of two-lane bridge spanning I-95. Services included geometrics, drainage, signing, MOT and construction support.

Purple Line

Bethesda to New Carrollton, MD

Mr. Collins led the roadway group for the eastern half of this major P3 project. Mr. Formichella designed many of the 3D models for new intersections throughout the 16 mile corridor.

In-Service Guardrail Performance Evaluations


Mr. Abel and Mr. Zhao performed analysis of guardrail end treatments the next day after reported crashes. They populated an ArcGIS database to assess real-life safety performance.

Traffic Engineering

Understanding multi-modal traffic patterns is crucial in a region like ours to squeeze every bit of efficiency out of our transportation networks. iDesign's engineers have a great deal of experience in signal design, warrant studies, maintenance of traffic, signing and pavement marking design, multi-modal corridors and traffic network analysis.

Thomas Hatem Bridge AET Conversion

Perryville, MD

Mr. Abel and Mr. Zhao provided signing, marking, traffic control, and construction phase services for the toll plaza demolition and pavement rehab at this crucial river crossing.

MD 152 Interchange for I-95 ETL

Joppa, MD

Our team coordinated with all aother disciplines to create a complex, multi-phase traffic control sequence for the total reconfiguration crucial interchange during the I-95 Express Toll Lane widening.

Hillsway Ave. Traffic Signal

Parkville, MD

iDesign provided ADA upgrades and mast arm signal design to replace a very congested aerial arrangement at an existing spanwire signal, one of four completed signals for the County.

Baltimore Mobility Study


Our team analyzed bicycle commuting stresses citywide to determine optimal cycle corridor routes. We also conducted on-route surveys to inform route priorities for The Circulator bus.

Structural Engineering

iDesign wants to help support your load whether it takes the form of a bridge, culvert, retaining wall or stormwater structure. Our team has both the design and inspection expertise to get your structure performing optimally.

Thurgood Marshall Justice Building

Washington DC

Dr. Wang assisted the Architect of the Capitol team in designing rooftop structural supports for installation of emergency radio equipment.

Spillway Structural Retrofit

Masonville Dredge Facility, Baltimore, MD

Dr. Shi designed a sheet-pile and steel retrofit to raise the spillway structure by 8' to prepare for the embankment to be raised.

Geographic Information Systems

All of our engineers are trained to use GIS effectively. We typically analyze new projects using GIS before our first visit, being mindful of the insight it can provide about grading, hydrology, utilities, soil, and ownership. We have a streamlined internal system for seamlessly working between ArcGIS, CAD platforms and cloud geodatabases. Mr. Abel has assisted with or built over a dozen project-specific geodatabases and continues to improve iDesign's field mapping capabilities.

SHA Impervious Removal Program

11 Maryland Counties

Dr. Wang has managed SHA's program to identify and remove underused pavement for MS4 credit. Cataloging team efforts in GIS ensures a thorough search with minimal redundancy.

New SWM Planning

METRO Stations and Parking Lots

Mr. Abel led the research team to geo-locate as-built METRO plans. He assisted in populating a custom web-based GIS index application and developed queries to shortlist potential new SWM facilities.


We would like the opportunity to collaborate with you on your next project. Email us at the link below to discuss how we can help your firm or agency succeed in their next endeavor.

Headquarters Office

4041 Powder Mill Rd.

Suite 204

Beltsville, MD 20705


Baltimore Region Office

10632 Little Patuxent Parkway, Suite 300C

Columbia, MD 21044