Did you know? New Traffic Law in Alabama

Posted by on Sep 10, 2019 in Did You Know, Road Safety, Safety, Transportation | No Comments
Did you know? New Traffic Law in Alabama

Did you know a new traffic law went into effect in Alabama on Sunday, September 1st? The new law, also known as Act 2019-386 or SB 254, requires all occupants of a motor vehicle to use seat belts (Alabama Law Enforcement Agency). You read that right. Up until now, back seat passengers did not have […]

Did You Know? What To Do When a Signal Is In Flash

Did You Know? What To Do When a Signal Is In Flash

By: Jeremy Greer, P.E. Traffic signals are part of daily life for most U.S. citizens.  Traffic signals are commonly seen at roadway intersections and primarily function to assign the right-of-way to the various traffic movements.  A traffic signal uses three colors, directional arrows, and circular indications to convey certain messages to drivers.  When signals work […]

Did You Know How Mile Markers On The Highway System Are Established?

Posted by on Nov 27, 2018 in Did You Know | No Comments
Did You Know How Mile Markers On The Highway System Are Established?

By: Mark Randall, PE (TN), CPESC You may know that mile markers or mile posts tell drivers their location along an interstate or highway, but did you know how those markers are established or the other functions that they serve? Mile markers are used to indicate the distance traveled within a state as well as […]

Did You Know? Rumble Strips

Posted by on Aug 28, 2018 in Did You Know | No Comments
Did You Know? Rumble Strips

By: Richard Holt, P.E.  Have you ever wondered what that terrible noise and vibration is when you slightly veer over the center or edge line of the roadway? Those noisy bumps are referred to as rumble strips or rumble stripes.  They are formed when a strip of asphalt has been milled (cut) or rolled with […]

Did You Know? Traffic Loons

Posted by on Apr 17, 2018 in Did You Know | No Comments
Did You Know? Traffic Loons

By: Diane Hammonds, P.E. / Branch Manager / LA office Some of us know about the birds called loons, but as traffic engineers we have loons too!  A loon is also referred to as a “Michigan Left” because of their wide use there.  It is pavement constructed outside of the travel lane to allow for vehicles […]

Did You Know? On-Call Contracts

Posted by on Mar 27, 2018 in Did You Know | No Comments
Did You Know? On-Call Contracts

By: Alicia Bailey, P.E. Did you know Sain Associates has many on-call contracts with ALDOT? There are many benefits of the on-call contracts.  First, they allow Sain Associates to work with ALDOT on a range of projects.  Over the years, the projects have ranged from surveying to corridor and traffic studies to a broad array […]

Did You Know: GIS Mapping

Posted by on Mar 14, 2017 in Did You Know | No Comments
Did You Know: GIS Mapping

Geographic Information System (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on the Earth’s surface. This system utilizes a combination of computerized drafting technology (for drawing point, line, and polygon features that represent real world objects) and relational database technology (for storing detailed information about those objects).

Did You Know: Roadway Signing

Posted by on Jan 10, 2017 in Did You Know | 2 Comments
Did You Know: Roadway Signing

By Justin Watson, E.I., Infrastructure Designer Roadway signing can directly affect the safety of the public by warning drivers and pedestrians of any number of roadway hazards, traffic maneuvers, navigation information, etc. Signing and/or resigning is one aspect of a safety project where the designer relays active information to the driver, whereas things such as […]

Did You Know: Superelevation

Posted by on Nov 8, 2016 in Did You Know | No Comments
Did You Know: Superelevation

By Mark Randall, P.E. Similar to how NASCAR tracks utilize “banking” to help a car’s downforce and velocity through a turn, civil engineers use superelevation on regular roadways to do the same thing. While some tracks, such as the Talladega Superspeedway, are banked up to 33 degrees (an increase of 6.5’ in vertical elevation every […]

Did You Know: Roundabouts

Posted by on Oct 25, 2016 in Did You Know | One Comment
Did You Know: Roundabouts

Posted by Nathan Currie, P.E. Although Alabama does not have as many roundabouts as some of its neighboring states, such as Florida or Georgia, these intersections are becoming more common throughout the state. This could be due to the Alabama Department of Transportation (ALDOT)’s 2015 release of a Roundabout Planning, Design, and Operations Manual providing […]