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Posted: Apr 4, 2017

EVTCC Announces New Driver/Operator Inspection Certification Exam

By Christian P. Koop

EVTCC Announces New Driver/Operator Inspection Certification Exam

Sometime around the beginning of June this year, the Emergency Vehicle Technician Certification Commission (EVTCC) will be offering certification exams for drivers and operators of emergency response vehicles (ERVs).

This exam will test the knowledge drivers and operators need to properly inspect their ERVs for safety and roadworthiness in accordance with the latest industry standards. This will be a level 1 exam, and it has been created mainly because of a request from the industry and from the growing concern of many who feel there is a vital need for it. The Driver Operator Inspections exam was successfully beta tested last year in Tempe, Arizona, and was very well received. Having drivers and operators certified to properly inspect their rigs in accordance with standards will also have the added benefit of enhancing preventive maintenance programs, which generally results in cost savings for the department’s maintenance budget - not to mention the reduction in liability exposure.

History

The drivers of intercity and over-the-road commercial vehicles are required to have a commercial driver’s license (CDL), which has very stringent requirements in place for the driver to inspect the vehicle daily - not only for pretrip but posttrip also. These CDL requirements do not apply to most fire-rescue departments. Part of the issue is there are no laws in place in most states to ensure ERV drivers and operators are fully qualified and have the required knowledge to perform an adequate visual and operational inspection. Let’s face it: Everyone knows a lot of accidents happen because the operator was not familiar with the limitations of the ERV he was driving. This new certification will not address this but is a big step in the right direction.

The need for this exam reminds me of when the industry decided that automotive mechanics (technicians today) needed a way to test their knowledge through certification. That was in 1972, and the organization that created those first exams was the National Institute for Automotive Service Excellence (NIASE), known today as Automotive Service Excellence (ASE). ASE’s main goal, in a nutshell, was to improve the quality of repairs and service in the automotive service and repair industry, which was suffering from the widespread public perception that the industry was corrupt with fraud when, in reality, most of the problems it was experiencing had more to do with incompetence than fraud. Another organization with a similar goal as the ASE is the EVTCC, commonly referred to as the EVT. It was created with support from the International Association of Fire Chiefs around 1988. The EVTCC’s main goal was to improve the quality of service and repair of fire apparatus and rescue equipment in North America through certification exams. Both of these nonprofit independent testing organizations have done a great job working toward their goals and have successfully added new exams as automobiles, trucks, and ERVs have become increasingly complex with the introduction of new technologies.

Preparation

Reference materials for review to prepare for this exam include National Fire Protection Association (NFPA) 1901, Standard for Automotive Fire Apparatus (2016 ed.), and NFPA 1911, Standard for the Inspection, Maintenance, Testing, and Retirement of In-Service Emergency Vehicles (2017 ed.). Also good to review is any fire apparatus operator’s manual that covers the chassis, pump, and aerial device and “Cummins Drivers Tips for Fire & Emergency Vehicles and Selective Catalytic Reduction.” There will also be a need to review three areas of the Code of Federal Regulations (CFR) under 49 CFR, which addresses federal regulat

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Posted: Apr 4, 2017

Siren Limitation Training

By Chris Daly

Overestimating the effective range of a siren is a common cause of fire apparatus crashes.

Studies have shown that the effective range of a siren at a 90-degree intersection is often less than 80 feet. This effective range may be less, depending on the design of the intersection and the soundproofing properties of an approaching vehicle.

While siren limitations are a common cause of emergency vehicle intersection crashes, few emergency vehicle operators course (EVOC) programs address the topic. The goal of this article is to provide training ideas that will help demonstrate the limited effective range of a siren.

1 A class 2 sound level meter. (Photos by author.)
1 A class 2 sound level meter. (Photos by author.)

Overview

A vehicle driving on a road will have a substantial amount of noise inside the passenger compartment of the vehicle. This noise is known as “ambient noise.” Ambient noise will depend on several factors, including the noise from the engine, the radio, the HVAC system, and the friction of the tires rolling on the road surface. The ambient noise inside a passenger vehicle traveling 45 miles per hour (mph) usually averages around 65 decibels (dB).

For a siren to be effectively heard by a civilian driver, it must penetrate the body of the vehicle and become louder than the ambient noise. Studies have shown that the siren level must rise approximately 10 dB above the ambient noise to effectively break the driver’s concentration. If the ambient noise inside the civilian vehicle is 65 dB, the siren must rise to 75 dB.

The structure of a modern vehicle is designed to keep sound OUT. On average, a modern vehicle will block approximately 30-40 decibels of noise from penetrating the passenger compartment of the vehicle. This is known as “insertion loss.” If a civilian driver requires 75 decibels of siren noise to react, the siren must arrive outside the driver’s window at approximately 110 decibels, assuming an average insertion loss of 35 dB.

2 A sound level meter calibrator
2 A sound level meter calibrator.

The Problem

Most sirens are rated at around 124 dB when measured 10 feet in front of the siren. As the distance from the siren doubles, the sound pressure of the siren will drop by approximately 6 dB. This concept is known as the “inverse square law.”

It is important to understand that this 6-dB drop in sound pressure level assumes that the distance measured is directly in front of the siren. When sound pressure measurements are taken at a 90-degree angle from the siren, the 6-dB drop can be more significant. Studies have shown that the reduction in sound pressure level at a 90-degree intersection could be as high as 11 dB. This is an important teaching point, as intersection crashes occur when the fire apparatus and civilian vehicle are approaching each other at a 90-degree angle.

3 The dBA/dBC setting on a sound level meter.
3 The dBA/dBC setting on a sound level meter.

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Posted: Apr 4, 2017

Siren Limitation Training

By Chris Daly

Overestimating the effective range of a siren is a common cause of fire apparatus crashes.

Studies have shown that the effective range of a siren at a 90-degree intersection is often less than 80 feet. This effective range may be less, depending on the design of the intersection and the soundproofing properties of an approaching vehicle.

While siren limitations are a common cause of emergency vehicle intersection crashes, few emergency vehicle operators course (EVOC) programs address the topic. The goal of this article is to provide training ideas that will help demonstrate the limited effective range of a siren.

1 A class 2 sound level meter. (Photos by author.)
1 A class 2 sound level meter. (Photos by author.)

Overview

A vehicle driving on a road will have a substantial amount of noise inside the passenger compartment of the vehicle. This noise is known as “ambient noise.” Ambient noise will depend on several factors, including the noise from the engine, the radio, the HVAC system, and the friction of the tires rolling on the road surface. The ambient noise inside a passenger vehicle traveling 45 miles per hour (mph) usually averages around 65 decibels (dB).

For a siren to be effectively heard by a civilian driver, it must penetrate the body of the vehicle and become louder than the ambient noise. Studies have shown that the siren level must rise approximately 10 dB above the ambient noise to effectively break the driver’s concentration. If the ambient noise inside the civilian vehicle is 65 dB, the siren must rise to 75 dB.

The structure of a modern vehicle is designed to keep sound OUT. On average, a modern vehicle will block approximately 30-40 decibels of noise from penetrating the passenger compartment of the vehicle. This is known as “insertion loss.” If a civilian driver requires 75 decibels of siren noise to react, the siren must arrive outside the driver’s window at approximately 110 decibels, assuming an average insertion loss of 35 dB.

2 A sound level meter calibrator
2 A sound level meter calibrator.

The Problem

Most sirens are rated at around 124 dB when measured 10 feet in front of the siren. As the distance from the siren doubles, the sound pressure of the siren will drop by approximately 6 dB. This concept is known as the “inverse square law.”

It is important to understand that this 6-dB drop in sound pressure level assumes that the distance measured is directly in front of the siren. When sound pressure measurements are taken at a 90-degree angle from the siren, the 6-dB drop can be more significant. Studies have shown that the reduction in sound pressure level at a 90-degree intersection could be as high as 11 dB. This is an important teaching point, as intersection crashes occur when the fire apparatus and civilian vehicle are approaching each other at a 90-degree angle.

3 The dBA/dBC setting on a sound level meter.
3 The dBA/dBC setting on a sound level meter.

Read more

Posted: Apr 4, 2017

Siren Limitation Training

By Chris Daly

Overestimating the effective range of a siren is a common cause of fire apparatus crashes.

Studies have shown that the effective range of a siren at a 90-degree intersection is often less than 80 feet. This effective range may be less, depending on the design of the intersection and the soundproofing properties of an approaching vehicle.

While siren limitations are a common cause of emergency vehicle intersection crashes, few emergency vehicle operators course (EVOC) programs address the topic. The goal of this article is to provide training ideas that will help demonstrate the limited effective range of a siren.

1 A class 2 sound level meter. (Photos by author.)
1 A class 2 sound level meter. (Photos by author.)

Overview

A vehicle driving on a road will have a substantial amount of noise inside the passenger compartment of the vehicle. This noise is known as “ambient noise.” Ambient noise will depend on several factors, including the noise from the engine, the radio, the HVAC system, and the friction of the tires rolling on the road surface. The ambient noise inside a passenger vehicle traveling 45 miles per hour (mph) usually averages around 65 decibels (dB).

For a siren to be effectively heard by a civilian driver, it must penetrate the body of the vehicle and become louder than the ambient noise. Studies have shown that the siren level must rise approximately 10 dB above the ambient noise to effectively break the driver’s concentration. If the ambient noise inside the civilian vehicle is 65 dB, the siren must rise to 75 dB.

The structure of a modern vehicle is designed to keep sound OUT. On average, a modern vehicle will block approximately 30-40 decibels of noise from penetrating the passenger compartment of the vehicle. This is known as “insertion loss.” If a civilian driver requires 75 decibels of siren noise to react, the siren must arrive outside the driver’s window at approximately 110 decibels, assuming an average insertion loss of 35 dB.

2 A sound level meter calibrator
2 A sound level meter calibrator.

The Problem

Most sirens are rated at around 124 dB when measured 10 feet in front of the siren. As the distance from the siren doubles, the sound pressure of the siren will drop by approximately 6 dB. This concept is known as the “inverse square law.”

It is important to understand that this 6-dB drop in sound pressure level assumes that the distance measured is directly in front of the siren. When sound pressure measurements are taken at a 90-degree angle from the siren, the 6-dB drop can be more significant. Studies have shown that the reduction in sound pressure level at a 90-degree intersection could be as high as 11 dB. This is an important teaching point, as intersection crashes occur when the fire apparatus and civilian vehicle are approaching each other at a 90-degree angle.

3 The dBA/dBC setting on a sound level meter.
3 The dBA/dBC setting on a sound level meter.

Read more

Posted: Apr 4, 2017

Fire Truck of the Future

By Wesley D. Chestnut

For many years, fire trucks have been predominantly some shade of red in color with flashing lights, bells, whistles, and sirens.

At face value, it’s arguable that fire trucks haven’t changed. However, as most member companies of the Fire Apparatus Manufacturers’ Association (FAMA) can attest, these vehicles have indeed advanced technologically because of innovations; changes in standards such as National Fire Protection Association (NFPA) 1901, Standard for Automotive Fire Apparatus; or government regulations. But has anyone thought about what a fire truck might look like or be able to do in the future?

Recent Technological Advancements

Many of you can probably remember when fire trucks were equipped with mechanical engines and manual transmissions. Gauges on the pumps gave indications based on mechanical means of sensing information to provide the readout. Not too long ago, you could purchase an apparatus without antilock brakes.

Today, fire trucks are equipped with computerized engines with sophisticated after-treatment devices and automatic transmissions. Although the changes related to the engine were aided by emissions regulations set forth by the government, the use of computerized technology has brought efficiencies to the engine and the vehicle. The engine can now tell you when something is wrong with relatively accurate and specific information.

As it relates to safety of the occupants, there are two areas in which fire trucks have advanced. First, the use of advanced air bag systems to increase the protection of the occupants during a vehicle crash has been implemented in these vehicles. Second is electronic stability control (ESC), which uses computerized technology to apply the vehicle’s brakes, assist steering, and disengage the throttle to reduce the chance of a vehicle crash.

With all the technological advancements throughout the years (too many to list here), some may wonder how else the fire truck could advance. What could a fire truck of the future look like? How might it function? Below are three advancements that may be implemented in fire trucks sooner than we think.

Vehicle-to-Vehicle Communication

It might be hard to imagine a vehicle being able to communicate with another vehicle, but it is becoming a reality. If you stop to think, the engine in the fire apparatus can “talk” to the transmission. The engine can also “talk” to pump controls. So, is it impractical to think a fire truck would not be able to talk to other fire trucks or passenger cars?

Many of you may have heard of vehicle-to-vehicle communication, more commonly known as V2V. This crash avoidance technology has been reviewed by the National Highway Traffic Safety Administration (NHTSA) for more than a decade. The system relies on communication from nearby vehicles to alert drivers of potentially dangerous situations that might lead to a crash. These systems are composed of devices, installed on vehicles, which use short-range radio communication to exchange messages identifying vehicle information such as speed, direction, and braking status. The logic in these systems uses information received from other vehicles to determine if a warning is needed to alert the driver of a potential danger.

One of the concerns in motor vehicle accidents involving fire trucks is when they occur at an intersection - more specifically, when the fire truck is struck by a passenger car even after appropriate maneuvers and driver signaling. If equipped with V2V, the oncoming passenger vehicle may be able to “talk” to the fire truck and alert the driver of this big, massive piece of equipment approaching the intersection to avoid a c

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