Must Know Info

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Process, Tips and Must-know Info
Pavement Preservation Treatments are not "apply-and-forget" processes. They require time to dry, to set, to cure and to settle into their final surface profile. Because of this, special attention should be paid to how we work and how we work together to ensure the very best new road surface. Learn below how projects are accomplished, and what you should expect throughout the process. Also find valuable tips on driving, parking, and getting around during installation, as well as how you can help us ensure it's safe and successful. 
Step 1: Minor Repairs


Chances are if you see a crack-sealing crew or patching crew working in your neighborhood, there's also a good chance that a fresh new road surface is on the way. That's because the first step to any road maintenance, and a must for quality pavement preservation, is to repair moderate cracks and potholes. 
How long does it take?
A few days, depending on weather and the size of the neighborhood. 
What's entailed?
Crack Sealing
-Quick-moving operation
-On-street parking affected
-Work zone protected by flaggers

Patching
-Localized failures fixed with asphalt
-Includes potholes, utility cuts, wide cracks, minor “alligatoring”


Step 2: Treatment Application

2-3 Days Out
Notification
Door to door notices will be distributed with specific dates and instructions
If there is on-street parking, No Parking signs will be posted in advance to help residents plan ahead

TIPS: Park your vehicle within walking distance if you need to leave after our start time to ensure we don't hold you up
If you need special arrangements, you can call your local crew supervisor whose number will be on your notice
Day of Installation
Road Prep
Cones are set out in preparation of the application truck coming through
Manhole and utility covers are protected 

TIP: This is a good indication that we'll be applying the slurry seal shortly and there may be wet slurry in front of your driveway.
Sweep
The road is swept to ensure a good bond and intersections are taped to give a cleaner edge
Fairly fast-moving so it causes very little disruption to traffic or routine

TIP: This will signify that the slurry seal application is imminent and residents should exit their driveways now so as not to get blocked in by a lane of wet slurry. 
Apply One Lane/Side
The crew begins by placing one lane of surface treatment down and marking it off with cones
Wet slurry should cannot be driven on at all
The lane will be closed for 1-4 hours to allow the surface treatment to dry enough to pass over 
Length of time depends on treatment type and weather conditions - you'll know it's safe to drive on when the cones have been removed
Special Note: Short cul-de-sacs may need to be done all at once and will be closed for a minimum of one hour.

TIP: Drive slowly and watch for the direction of traffic control to ensure everyone's safety
Finish The Road
When the first lane has dried enough for traffic, the second lane is applied
At least one lane will be available at all times. This cul-de-sac is partially done.
You will always have access to and from your home, but may not be able to cross the wet slurry for 1-2 hours.

TIP: If you're in a bind and have to cross wet slurry to get in or out of your drive, call the local crew chief to put some aggregate down for you to cross it safely. You'll find their number on the notices we handed out a couple of days earlier.

NOTE: Wet vs. Dry
Note the brownish color of the wet slurry vs. the black color of the dry slurry

TIP: Never drive on wet slurry unless you are willing to get it on your vehicle and your driveway.
If in doubt, don't drive on it.
Again, if you must cross wet slurry, talk with the supervisor about spreading some "sand" to allow you to do so safely. Their number is on your notice.
 
NOTE: Safe Crossing Areas
Finely crushed rock aggregate "sand" is spread at intersections to protect the wet slurry and vehicles
This will remain on the road while the surface cures and will be swept up at a later date

TIP: Only cross over wet slurry where you see this aggregate and remember to drive conservatively when on it.


NOTE: Excess Material Piles
Crews will be working to trim up edges as part of the process and there will be small piles of material where that happens
Material is usually removed within 24 hours

TIP: If you see material sitting too long, or there is material where it shouldn't be, call the superintendent on your notice and they'll take care of it

Step 3: Drying and Curing

24-48 Hours After Install
Protecting Your Street's New Surface
- Wet and freshly dried treatments are vulnerable to damage from vehicles
- High temperatures will soften any type of asphalt material
- The marks shown are from driving and hard turning on a fresh slurry seal
- Most of this type of marring will blend in in time however
TIPS: Avoid sitting still and turning your wheels or cutting the steering wheel hard like when backing out of a driveway
Instead, back out and begin moving forward before turning your wheels
Keep speeds low to moderate for at least 24 hours and a few days if it's really hot outside
Step 4: Settling In
2-3 Weeks After:
There Will Be Loose Aggregate
For the first couple of weeks after the install, it's natural for some of the fine surface gravel to wear out of the slurry matrix.
The loose gravel is almost always no larger than 1/4 of an inch in diameter by design 
There may also be some of the aggregate sand left at intersections or other areas where it was spread for traffic to cross. There may also be places along the gutter where loose aggregate can accumulate.

Don't worry!


Step 5: Inspection
2-3 Weeks After Application
After the surface treatment has had enough time to settle in, and we've completed our installation punch-list, we'll do a final inspection. (This time frame varies due to weather and traffic conditions.) If there's too much material on the surface of the roads, we'll do a vacuum sweep to remove it.
Step 6: Achieving Profile
2 Weeks to 2 Months After:
The surface may appear rough or the installation "sloppy"
For the first couple of weeks to couple of months after the install, it's also natural for the new surface to have some irregularities. These may include slight ridges, drag marks and/or color variations. These are all due to the environmentally friendly nature of the treatment's ingredients and the remnants of the installation process. In almost all cases, this is not bad work, but the nature of the treatment material and the best practices for installing it quickly and economically. Both the local or state road maintenance authorities and our crew supervisors continuously monitor the progress of the project. If there are any issues detected, they are put on a punch list to be corrected after the designated neighborhood streets have been treated. The photographs below are of an area of a fresh installation and the same area two months later. 
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