I -278 in New York City

A general guide to height signs here in NYC and surrounding is, black/yellow is advisory (you will have additional height), black/white is regulatory and is exact height.

 

I don't know the numbers or percentages, but yeah, you'll find many more yellow/black signs than white/black.

The following link will give you almost everything you need to know about driving a truck in and through New York City. It's pretty large and contains links to a ton of useful information, so don't skim through. If you take your time here, you'll find data, maps, routes, bridge locations, parking rules/restrictions, etc:

Trucks and Commercial Vehicles:

Off-Hour Delivery Program
2010 New York City Truck Route Map
Download New York City Truck Route Data
Commercial Vehicle Identification
Low Bridges
New York City Traffic Rules
Oversize/Overweight Permitting
Parking a Truck or Commercial Vehicle
Reducing Emissions From Non-Road Equipment (Local Law 77)
Size and Weight Restrictions
Staten Island Truck Route Changes
Truck or Commercial Vehicle?
Truck Route Management and Community Impact Reduction Study
Truck Routing
Vehicle Restrictions on Parkways
Weight Limits in New York City Aligned with State Limits

http://www.nyc.gov/html/dot/html/motorist/trucks.shtml

Hope this helps!

 

In New York State (Nassau and Suffolk Counties, Long Island):

Qualified Access Highways

Under the 1990 Omnibus Truck Safety Bill, New York authorized the use of 53 foot trailer combinations effective November 1990. Per § 385(3)(e) of the Vehicle & Traffic Law, the 53 foot trailer combinations are restricted to the Qualifying and Access Highway system. Because New York City felt that 53 foot trailers would be unable to maneuver effectively on City streets, a provision was included in the legislation that prohibited the vehicles within the City. However, in order to provide service to Long Island, one specific route corridor consisting of the following interstate highways was approved for travel to Long Island. The New York City interstate routes approved for 53–foot trailers are as follows:

• * I-95 - from Bronx-Westchester County line to I-695
• * I-695 - from I-695 to I-295
• * I-295 - from I-695 to I-495 via Throgs Neck Bridge
• * I-495 - from I-295 to Queens-Nassau County line

A detailed listing of the qualified access highway system can be viewed in the Official Description of Designated Qualifying and Access Highways in New York :

https://www.nysdot.gov/divisions/op...ion-systems/repository/2010 trk access bk.pdf


New York State Truck regulations:

https://www.nysdot.gov/divisions/operating/osss/truck/regulations


In New York City (Brooklyn, Queens, Staten Island, Manhattan & The Bronx):

A 53–foot trailer is allowed to travel through New York City to reach destinations on Long Island using a very specific route that includes I–95 from the Connecticut border south to I-695 to I-295 then over the Throgs Neck Bridge to the Long Island Expressway (I-495) east. No 53–foot long trailer is allowed to make pick–ups or deliveries in New York City. Section 385 of New York State’s Vehicle and Traffic Law makes that very clear. A complete list of traffic rules and designated truck routes is on New York City DOT’s Web site The preceding external link opens a new browser window.

Commercial Motor Vehicle Tax (CMVT)–Non–passenger commercial motor vehicles that are principally used in the City (i.e. 50 percent or more of its mileage during the year is within the City) or in connection with a business carried on in the City, and motor vehicles regularly used in New York City for the transportation of passengers, regardless of the mileage within the City are subject to a CMV Tax. For more information, visit this NYC.GOV Web site The preceding external link opens a new browser window.

For bridge and tunnel information and restrictions refer to the New York City DOT’s Web site. They have a listing of useful contact numbers The preceding external link opens a new browser window that includes telephone numbers for the various New York City bridges and tunnels.

All commercial motor vehicles operating in New York City must display the name and address of the owner in letters and/or numbers that are at least 3 inches in height.