Company lists · Data refreshed September 2026

Top 25 Transportation planning consultants based in the United States

Name: Transportation planning consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,211 companies tracked

RevenueBase identified 1,211 transportation planning consultants headquartered in the United States as of September 2026 and tracks 64,158 professional contacts across them, including 34,865 with verified work emails. New York is the largest hub.

This list covers transportation planning consultants headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

1,211Companies

64,158Contacts tracked

34,865Verified emails

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The 25 largest transportation planning consultants based in the United States

Ranked by team size

Top 25 of 1,211 transportation planning consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to transportation planning consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Michael Baker International	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 19, 2026	5,001-10,000	4,362 contacts →
	Indirect evidence “Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…” Source: RevenueBase Database · checked Sep 19, 2026
2	STV	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	3,556 contacts →
	Indirect evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 19, 2026
3	First Transit	Indirect evidence	Lombard, IL, United StatesHQ checked Sep 19, 2026	10001+	2,611 contacts →
	Indirect evidence “First Transit was acquired in 2023 and is now Transdev.” Source: RevenueBase Database · checked Sep 19, 2026
4	VHB	Indirect evidence	Watertown, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,277 contacts →
	Indirect evidence “We are VHB.” Source: RevenueBase Database · checked Sep 19, 2026
5	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 19, 2026
6	Rk&k	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,641 contacts →
	Partial evidence “RK & K is a full-service planning, engineering, environmental, and construction management/inspection firm serving a wide range of clients throughout the United States.” Source: RevenueBase Database · checked Sep 19, 2026
7	GPI Greenman-Pedersen, INC	Indirect evidence	Melville, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,354 contacts →
	Indirect evidence “With a staff of over 1,800 professionals, Greenman-Pedersen, Inc.(GPI) is a leading engineering consulting firm that specializes in the innovative design and construction of…” Source: RevenueBase Database · checked Sep 19, 2026
8	Volkert, INC	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,199 contacts →
	Indirect evidence “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Source: RevenueBase Database · checked Sep 19, 2026
9	WSB	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Forge ahead.” Source: RevenueBase Database · checked Sep 19, 2026
10	David Evans And Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	501-1,000	1,031 contacts →
	Partial evidence “Since its founding in 1976 in Portland, Oregon, DEA has become a recognized leader for progressive and sustainable design and management solutions for complex transportation, land…” Source: RevenueBase Database · checked Sep 19, 2026
11	GAI Consultants, INC	Strong evidence	Homestead, PA, United StatesHQ checked Sep 19, 2026	501-1,000	964 contacts →
	Strong evidence “Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…” Source: RevenueBase Database · checked Sep 19, 2026
12	Parametrix	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	501-1,000	880 contacts →
	Indirect evidence “At Parametrix, we help our clients imagine what's possible.” Source: RevenueBase Database · checked Sep 19, 2026
13	Transystems	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 19, 2026	1,001-5,000	850 contacts →
	Partial evidence “TranSystems plans, designs, and oversees construction to enhance the transportation networks and infrastructure that makes communities more livable today and in the future.” Source: RevenueBase Database · checked Sep 19, 2026
14	DUDEK	Partial evidence	Encinitas, CA, United StatesHQ checked Sep 19, 2026	501-1,000	795 contacts →
	Partial evidence “Dudek is an environmental, planning, and engineering consulting firm.” Source: RevenueBase Database · checked Sep 19, 2026
15	Psomas	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	501-1,000	748 contacts →
	Indirect evidence “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Source: RevenueBase Database · checked Sep 19, 2026
16	Tighe & Bond	Partial evidence	Westfield, MA, United StatesHQ checked Sep 19, 2026	501-1,000	646 contacts →
	Partial evidence “Tighe & Bond is the Northeast’s leading engineering, environmental, planning, and design consulting firm.” Source: RevenueBase Database · checked Sep 19, 2026
17	MSA Professional Services	Indirect evidence	Baraboo, WI, United StatesHQ checked Sep 19, 2026	501-1,000	602 contacts →
	Indirect evidence “As a full-service consulting firm, MSA Professional Services (MSA) is all about creating communities that work.” Source: RevenueBase Database · checked Sep 19, 2026
18	Neel-Schaffer, INC	Partial evidence	Jackson, MS, United StatesHQ checked Sep 19, 2026	501-1,000	591 contacts →
	Partial evidence “Neel-Schaffer is a multi-disciplined engineering, planning and construction management firm that was founded in 1983 and today is one of the largest private, employee-owned…” Source: RevenueBase Database · checked Sep 19, 2026
19	Cordoba Corporation	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	501-1,000	516 contacts →
	Strong evidence “CORDOBA CORPORATION is a California engineering, construction management, program management, and planning firm specializing in transportation, water, energy, education and…” Source: RevenueBase Database · checked Sep 19, 2026
20	Mark Thomas	Partial evidence	San Jose, CA, United StatesHQ checked Sep 19, 2026	501-1,000	489 contacts →
	Partial evidence “Mark Thomas provides planning, civil and structural engineering, construction management, land surveying, landscape architecture and urban design, and district management for…” Source: RevenueBase Database · checked Sep 19, 2026
21	Railpros	Indirect evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	481 contacts →
	Indirect evidence “RailPros was founded in and is exclusively focused on providing rail and transit engineering and construction services.” Source: RevenueBase Database · checked Sep 19, 2026
22	SRF Consulting Group	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 19, 2026	201-500	471 contacts →
	Strong evidence “SRF Consulting Group is a full-service consulting firm with a broad base of award-winning services, including- Transportation and Transit Planning - Community and Land Use…” Source: RevenueBase Database · checked Sep 19, 2026
23	Lockwood, Andrews & Newnam, Inc. LAN	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	461 contacts →
	Partial evidence “Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.” Source: RevenueBase Database · checked Sep 19, 2026
24	Ayres Associates	Indirect evidence	Eau Claire, WI, United StatesHQ checked Sep 19, 2026	201-500	458 contacts →
	Indirect evidence “In 1959, Owen Ayres founded Ayres Associates atop a steadfast foundation of honesty, innovation, and good old-fashioned hard work – and a vision for a firm that revolved around…” Source: RevenueBase Database · checked Sep 19, 2026
25	Fehr & Peers	Strong evidence	Walnut Creek, CA, United StatesHQ checked Sep 19, 2026	201-500	448 contacts →
	Strong evidence “We are a transportation planning and engineering firm with 24 offices and over 400 staff nationwide.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: transportation planning consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names transportation planning consultants.
Partial evidence: Its own public description names part of transportation planning consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transportation planning consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,211 transportation planning consultants based in the United States

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Transportation planning consultants based in the United States at a glance

As of Sep 19, 2026

54.3%Verified-email coverage

53.0Average contacts per company

11-50Median size (employees)

2.6%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

574

11-50

370

51-200

178

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,211 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among transportation planning consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “transportation planning consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names transportation planning consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among transportation planning consultants, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 34,865 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Transportation planning consultants by metro

Transportation planning consultants in New York31
Transportation planning consultants in Los Angeles28

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names transportation planning consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many transportation planning consultants are there based in the United States?

RevenueBase identified 1,211 transportation planning consultants headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Michael Baker International, headquartered in Pittsburgh, tops this list with the largest team on record.

Which city has the most transportation planning consultants?

New York leads with 31 headquartered companies, followed by Los Angeles (28) and Houston (24).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 34,865 verified decision-maker contacts tracked across these 1,211 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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Transportation planning consultants by geography

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.