I-4 Ultimate Project Update and Noise Barrier Meeting Project - - PowerPoint PPT Presentation

I-4 Ultimate Project Update and Noise Barrier Meeting

Project Location

• 21 miles through greater

Orlando

• Two counties
• Two water management

districts

• Several municipalities
• Two major funding

partners

Managed Lanes

• 4 Managed Lanes
• 6 General Use Lanes (GUL) + Auxiliary Lane

Project Goals

• Replace aging infrastructure

– Corridor is 50 years in age – Bridges projected to become structurally deficient – Pavement deterioration

Project Goals

• Create jobs

– Construction industry jobs are down since 2007 – Available local labor pool – $1 billion spent on highways supports 28,000 jobs

How To Stay Involved

• All Meeting Information on Moving-4-ward website
• Sign up on website to stay informed
• Community Surveys
• www.moving-4-ward.com

Procurement Schedule

Shortlist and draft RFP June/July 2013 Final RFP and Instructions to Proposers (ITP) September 2013 Proposals due February 2014 Best value selection April 2014 Financial Close July 2014 Notice to Proceed 1 – Design Fall 2014 Notice to Proceed 2 – Construction NTP1 + ~ 3 months

Project Video

Video is available for viewing on the moving-4-ward.com website in the presentations section under: Noise Barrier Meetings Materials

Noise Barriers: Who benefits?

• Only homes next to the noise barrier, or within

the 200 ft. shadow of the wall will get a noticeable noise reduction

• Goal of reduction is 10 decibels with a minimum
• f 5 decibels

Noise Barriers: Criteria for use

• Consideration for the implementation and

construction of noise barriers along Interstates is mandated by the Federal Highway Administration and follows certain criteria.

• Evaluation for the expansion of Interstate 4

included noise studies to determine areas that would exceed Florida’s Noise Abatement Criterion of 66 decibels (dB)

Noise Barrier: Criteria for use

COMMON OUTDOOR ACTIVITIES NOISE LEVEL dB(A) COMMON INDOOR ACTIVITIES Jet Fly-over at 1000 ft

• --110---

Rock Band Gas Lawn Mower at 3 ft.

• --100---

Diesel Truck at 50 ft., at 50 mph

• --90---

Noise Urban Area (Daytime)

• --80---

Garbage Disposal at 1 m (3 ft) Gas Lawn Mower at 100 ft.

• --70---

Vacuum Cleaner at 10 ft

• --66---

Normal Speech at 3 ft Commercial Area

• --60---

Large Business Office Heavy Traffic at 300 ft

• --50---

Dishwasher Next Room Quiet Urban Daytime

• --40---

Theater, Large Conference Room (Background) Quiet Urban Nighttime

• --30---

Library Bedroom at Night, Concert Hall Quiet Suburban Nighttime

• --20---

(Background) Quiet Rural Nighttime

• --10---

Lowest Threshold of Human Hearing

• --0---

Source: California Dept. of Transportation Technical Noise Supplement, Oct. 1998, Page 18.

• “Reasonableness and Feasibility Factors” for

the placement of noise barriers are derived from federal guidelines. These determine if a barrier should or should not be placed in a local community.

Noise Barriers: Reasonableness and Feasibility Factors

Noise Barriers: The Myths

• Noise barriers are not used to block the view of

traffic from their homes. They are strictly for noise abatement.

• Noise barriers are not protective barriers. They

might slow a car down but are not used for safety

• purposes. However shoulder mounted barriers

have been crash tested.

Noise Barriers: How They Work

• There cannot be any openings in the barrier for driveways
• r roads because it would not be an effective noise barrier.
• The noise barriers work by reflecting the sound waves back

toward traffic. People on the opposite side of the roadway from the walls will not notice a significant increase in sound if any at all. If there is an increase it is usually between 1-2 dB which is less than the average person can audibly detect.

• Barriers are designed to make a 10 dB reduction in sound

but may only reach the minimum of 5 dB. Only residents within the 200 ft. shadow of the barrier, depending on the height, will notice a reduction.

Noise Barriers: How They Work

• The greatest reduction of noise will be right next to the barrier and

the benefit will gradually decrease from there out to the shadow’s

• edge. As sound waves travel they begin to diminish.

Noise Barrier Advantages and Disadvantages

Advantages

• Can provide an audible reduction in highway traffic noise to areas directly

behind the barrier

• Can be designed to be aesthetically pleasing from both the highway and

property owner sides of the barrier

• Can provide privacy from passing motorists

Disadvantages



Can block the view of commercial or landmark signs



Can adversely affect existing ornamental vegetation in proximity to the barrier



Trees within the FDOT R.O.W. may be removed in order to construct this noise barrier



Can create nighttime shadow areas



Noise barriers can obstruct breezes and sunlight



Noise barriers may attract graffiti



Noise barriers may reduce, but cannot eliminate, the traffic noise



Noise barriers may present a public safety concern because the view of police and other safety patrols traversing the highway will be blocked.

Noise Barrier: Shoulder

Noise Barrier: Ground

Recommended Noise Barrier Locations

Conclusion - Questions

• Our Presentation is concluded
• All Materials from tonight's presentation will be available on the

project website at www.moving-4-ward.com

• Please take a few moments to view the graphics on display
• FDOT and RS&H Staff are on hand to answer any questions you may

have