Lancaster Mobley

Oregon's longest-standing independent transportation engineering and planning practice, with over 40 years of industry experience

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About the firm

Lancaster Mobley is a Portland, Oregon-based transportation engineering and planning consultancy serving public and private sector clients throughout the Pacific Northwest. It offers a comprehensive range of transportation consulting services including traffic impact studies and analyses, transportation demand management plans, traffic signal design and modification, street illumination design, site vehicular circulation studies, pedestrian safety assessments, and infrastructure design. It has worked with public agencies such as TriMet, Portland Parks and Recreation, ODOT, and local school districts, as well as private developers across residential, commercial, civic, and mixed-use sectors. In late 2025, it merged with AKS Engineering & Forestry, LLC.

Firm type: Transportation Engineering

Capabilities

Traffic Engineering

Service website

Comprehensive traffic engineering and analysis to optimize safety, vehicle flow, and capacity on roadways and intersections.

Traffic Impact Studies & Transportation Impact Analyses
Traffic Signal Warrant & Safety Analyses
Parking Demand & Site Circulation Studies

Transportation Planning

Service website

Long-range planning, multimodal studies, and strategic transportation coordination for campuses, communities, and developers.

Transportation System Plan (TSP) & Capital Improvement Plan (CIP) Coordination
Transportation Demand Management (TDM) Plans
Multi-modal Transportation Studies

Infrastructure Design

Service website

Detailed engineering and construction documents for signals, lighting, signing, striping, and pedestrian safety features.

Traffic Signal Design & Modification
Street Illumination & Photometric Assessment
Signing & Striping Plans
Pedestrian Safety Improvements

Industries

Transportation · Residential · Multifamily Residential · Affordable Housing · Commercial · Mixed-Use · Education · Transit · Government · Parks & Open Space · Public Safety · Retail · Industrial

Projects

Commons on the Tualatin

Tualatin, OR · Multifamily Residential

Project details

Provided transportation engineering for an apartment complex expansion in Tualatin, Oregon.

Clackamas Community College Master Plan

Clackamas County, OR · Education · 2015 · Client: Clackamas Community College

Project details

Delivered transportation engineering and strategic planning services for multiple bond construction cycles.

Oregon City Transit Center Reconfiguration

Oregon City, OR · Transit · Client: TriMet

Project details

Prepared a comparative transportation analysis of two design alternatives for transit center reconfiguration.

PSU Gateway Center

Portland, OR · Education · Client: Lever Architecture

Project details

Conducted loading analysis, vehicular access studies, photometric assessment, traffic signal design, and street lighting design.