Showing posts with label channelizers. Show all posts
Showing posts with label channelizers. Show all posts

Tuesday, November 26, 2013

Safety Bollards for Contraflow Bicycle Lanes

Safety bollards have always been useful for marking bicycle lanes.  Now, with the popularity of contraflow bike lanes, using bollards is more important than ever to ensure the safety of both cyclists and motorists.

Contraflow Bike Lanes: a Growing Trend

Contraflow lanes allow bicycles to travel in the opposite direction of motorists.  In cities with substantial numbers of one-way streets, these lanes benefit cyclists in many ways, including the following. They:

  •     Reduce motorist/cyclist conflicts
  •     Allow cyclists to safely enter the flow of traffic at all points
  •     Provide safe, easy access to popular destinations
  •     Reduce the distance cyclists must travel on roads used by motorists
  •     Offer cyclists safer, more pleasant routes of travel without interfering with motor vehicle traffic


To maximize the safety of everyone who uses public roads, contraflow bicycle lanes should only be placed on streets with the following characteristics:

  •     Low volumes of vehicular traffic
  •     Sufficient room to construct a contraflow lane to the left of motorists’ direction of travel
  •     Substantial current use by cyclists
  •     A minimum number of intersecting alleys, driveways, or streets
  •     Enough room for signs advising motorists that a contraflow lane is present


Impact of Existing Contraflow Lanes in Major Urban Areas

Contraflow lanes have existed in cities like Cambridge, Massachusetts; Madison, Wisconsin; and Portland, Oregon, for well over a decade.  In each city, they have significantly improved traffic flow, reduced the number of bicycle/motor vehicle accidents, and enhanced the usability of public roadways for everyone.  They’re especially helpful around large colleges and universities where hundreds or even thousands of students commute to and from classes on bicycles.


The Role of Safety Bollards in Marking Contraflow Lanes

Safety bollards, with their high visibility and sturdy construction, are extremely useful on streets with contraflow bicycle lanes. They remind motorists to watch out for bike riders. They also remind cyclists to stay within the lane’s boundaries. Together, these two safety measures can help both motorists and bike riders stay safe on the nation’s roadways.

To learn more about varieties of safety bollards, call Impact Recovery Systems today at 1-800-736-5256.

Monday, July 22, 2013

Traffic Safety Products that Help Ensure Cyclist Safety

Originally Posted at:  www.impactrecovery.com

Traffic safety products play an integral role in ensuring the safety of bicyclists in urban areas.  Their use is part of a specialized sub-discipline known as bicycle transportation engineering.  It seeks to create bike-friendly areas along and within existing roadways.  It also focuses on the layout and construction of dedicated paths for cyclists as well as pedestrians.

Some of the ways that transportation engineers have tried to make streets safer for cyclists include the following modifications:
  • Shared use paths – These are bikeways that run parallel to conventional roadways, yet are physically divided from them by delineators or safety signs.
  • Bicycle lanes – These are portions of roadways meant specifically for use by cyclists.  They’re normally marked by a solid white stripe on the pavement.  They’re much narrower than motor vehicle lanes and run alongside the edge of the road.
  • Shoulders – These are traditionally used as a place for inoperable vehicles to pull over.  However, in many areas, they have been modified for use by cyclists and those on foot.
  • Wide outside lanes – One of the chief complaints motorists have about sharing the road with cyclists is having to slow down to accommodate them.  Wide outside lanes are intended to eliminate this problem by giving vehicles more room to pass bicycles safely.  They are chiefly used in rural areas where shoulders are frequently underdeveloped and unsafe for bicycle traffic.
  • Shared bus lanes – These are dedicated bus lanes that also permit cycle traffic, depending on the local public transport schedule.  These are especially popular in France and the UK.
  • Shared space streets – These are simply public streets that give equal priority to all types of vehicles.  Motorists must accommodate the rate at which cyclists travel.  While widespread in parts of Europe, they have only recently been introduced to the United States.
  • Bike paths – Often built on the sites of abandoned railroad tracks, these paths are completely independent of public roadways.  They’re normally shared by cyclists and pedestrians, as well as horses in some locations.  Bike paths are also popular features of greenways.

Other Bicycle Safety Measures
In addition to creating special routes for bicycles, transportation engineers are taking other measures and developing additional traffic safety products to ensure the safety of bike riders.  These include:
  • Modified traffic lights that are able to detect the presence of cyclists, taking their presence into account when issuing signal changes.
  • Modified road surfaces that move potholes, surface markings, storm drains, and other impediments to bikes away from their path of travel. 
  • Bicycle parking lots that allow bike owners to secure their cycles to secure metal stands, discouraging theft.  Some of these parks have staff members on-site, while others are routinely patrolled by law enforcement.

Factors Involved in Creating Bicycle Safe Zones
Not all urban roadways can be converted to bike-friendly areas with the same degree of ease.  Planners normally give priority to those zones that can be transformed with minimal effort.  Some factors that guide the decision process include the following:
  • The level to which motor vehicle traffic in the area can be reduced.
  • The prospects for establishing traffic calming measures.
  • The level to which danger zones for cyclists, such as junctions and crossways, can be monitored and improved.
  • The prospects for establishing reasonably secure bicycle parking facilities in the area.

The Role of Traffic Safety Products in Ensuring Cyclist Safety
Infrastructure features that promote bicycle safety fall into two categories:
  1. Signage that alerts motorists to the presence of cycles.  These often feature messages like “share the road” along with a graphic showing a bicycle. 
  2. Elements like raised curbs, walls, fencing, and bollards, which create physical barriers between motorists and cycles.


The trend towards greater cycle use is part of a new emphasis on physical fitness and a greener environment.  As such, it has the potential to do great good and should be encouraged as much as possible.  Modest infrastructure modifications and new traffic safety systems are small prices to pay in exchange for creating a healthier, more active populace, which is what cycling is all about.

Thursday, May 23, 2013

When to Use Tubular Markers


Tubular markers are similar to hazard marker signs in that they are meant to mark off a specific area.  These road safety devices warn motorists of conditions created by work activities, to guide road users, or to warn of some other road obstruction.  Markers and delineators should be used in conjunction with safety signs so that motorists know just what to expect ahead.

Tubular markers are different from hazard markers in that they are narrow and can fit on a street or highway space that does not have enough room for a large sign.  Tubular markers are commonly used to divide opposing lanes of traffic, channel traffic in the right direction, mark the edge of the road in case of a drop-off, and to mark urban turn restrictions.

Tubular markers can also be used in a parking lot, together with parking lot safety signs.  Safety signs such as handicapped parking space signs, stop signs and pedestrian crossing signs are important and useful.  Markers help to make a parking lot safe by indicating where a median is, or some other area that cars cannot drive through.  As markers are made using bright colors with retro-reflective material, they are clearly visible in the evening and at night.

Impact Recovery Systems carries a wide range of tubular markers that can be used for many purposes.  There are a number of base options to choose from.  The first is a permanent base, which would serve well on highways or in parking lots. Impact Recovery also offers the convenience of quick release bases, which offer the ability to switch out signs quickly without the need for extra tools.  In-ground and snow-plowable bases are also available.   The road type and height of the marker will determine which type of base is the most appropriate.  The markers themselves come in seven different color options, with five different reflector/sheeting options.  The markers are also made in various heights and can be custom-made if desired.

Road markers are important, as they help to direct traffic and divert it from danger.  These markers should be well made, using high quality materials that will stand the test of time.  They can be used to divide traffic, divert it, or mark off an area that vehicles should not drive through.  Tubular markers, available in various sizes, color, and heights, are sure to provide the protection needed so that motorists can drive through an area without incident.

Wednesday, May 15, 2013

Traffic Separator Curbing is Tricky but Manageable


Traffic separator curbing is used to channelize travel lanes.  Normally constructed of tubular markers and high-density plastic curbs, it’s often used in temporary locations such as around construction sites.  As it must withstand the rigors of use around congested areas, it should meet the following criteria:
  1. It should be able to absorb impacts from vehicles undamaged.  It should stay in its base even if struck multiple times.  It should also be unaffected by wide temperature ranges.
  2. It should be continuous and bolted tightly to the underlying pavement.  Tubes must be bolted or pinned to the curb.  Curbing must be able to stay upright throughout the day and be unaffected by high winds and other weather phenomena.
  3. Posts should be of standardized heights for the sake of both visibility and uniformity.  Commonly accepted heights are 36”, 42”, and 48”.
  4. Delineator posts should be a minimum of three inches in diameter where it faces approaching traffic and at least two inches in diameters in all other directions.
  5. Posts should have at least two reflective bands 3” wide or wider.  The higher band should be within two inches of the top of the structure.
The manual of Uniform Traffic Control Devices (MUTCD) lists seven principles for the use of all temporary traffic control (TTC) measures, including separator curbing:
  1. The same principles that govern the creation of permanent road markers should be employed in designing TTCs.
  2. TTCs should interfere with road worker’s movement as little as possible.
  3. TTCs should give approaching motorist, bicyclists, and foot traffic adequate advance warning of changing traffic conditions.
  4. TTC components should be regularly inspected during both day and night.
  5. TTC placement should allow for vehicles to pull off the road surface in cases of accidents and/or mechanical trouble.
  6. Those who work around TTC structures should be trained in their use.
  7. The needs of motorists, nearby property owners, emergency responders, and the community at large should be addressed when planning the use of TTCs.

By following these guidelines, traffic separator curbing and other TTC measures can be an enhancement to public safety, not a hindrance.