Advancing active mobility in greater Prince William, Virginia

Category: Pedestrians (Page 1 of 6)

“Taming Our Arterials” Webinar, September 29 @ 7 PM

Multi-lane suburban arterial roads–such as Routes 1, 28, 123, and 234 Business in Prince William County– are dangerous and hostile for pedestrians and bicyclists.  How can we make these roads safer?  That’s the theme of this virtual panel discussion on Thursday, September 29, 2022 at 7 p.m., sponsored by our friends at the Fairfax Alliance for Better Bicycling, Toole Design Group, and the Coalition for Smarter Growth.

Register in advance on Zoom.

Andy Clarke of Toole Design Group, Fairfax County Lee District Supervisor Rodney Lusk, Stewart Schwartz of the Coalition for Smarter Growth, and Bill Cuttler of VDOT’s Northern Virginia Construction District will discuss long- and short-term methods that can be used to tame our big roads.  They will discuss some techniques that have been shown to work, and address how to overcome institutional barriers to making these changes.

Event Organizers

NoVA Trails Summit, October 20, 2022

The Northern Virginia Regional Commission (NVRC) will host a Northern Virginia Recreational Trails Summit on Thursday, October 20, 2022 from 10 am to 2:30 pm at its offices at 3040 Williams Drive, Suite 200, Fairfax VA 22031.

This will be a working meeting to identify opportunities to create connections and improve communities through recreational trails in Northern Virginia.

The Northern Virginia Regional Commission and partner organizations invite all interested jurisdictions and organizations to partner and share thoughts and ideas on how to improve our communities through the coordination and development of trails and parks.

Interested representatives and staff, community organizations, and businesses can register a member or representative.   NVRC and our partners look forward to a diverse and engaging group of attendees and would love to see new faces and hear new voices!  Space is limited, so please register early!

To learn more about NVRC and its role in the Potomac Heritage National Scenic Trail visit

Our Input for the Route 234-Clover Hill Road Bowtie Intersection

2017 Concept for a Clover Hill Road/Prince William Parkway “Bowtie” Intersection

Recently, the Prince William County Department of Transportation asked for our feedback on their proposed preliminary design for rebuilding the intersection of the Prince William Parkway (Route 234) and Clover Hill Road near Manassas as an “innovative” bowtie intersection, where all direct left turns are eliminated and instead accommodated via two roundabouts on the minor cross street.   Our reply is posted below.   We will track this upcoming project in the coming years as the design is refined for construction.

Thank you for soliciting Active Prince William’s input on how the redesigned intersection of Clover Hill Road at the Prince William Parkway can best serve people walking and bicycling.

Conventional On-Road Bike Lanes Are Appropriate for Clover Hill Road

Clover Hill Road provides an important low-traffic bicycling connection between the City of Manassas (and adjacent residential neighborhoods within the County) and Manassas Regional Airport and points west, including the Broad Run VRE station and the new Route 28 shared-use path that now extends though Bristow all the way to Nokesville.  On the southwest side of Route 234, Clover Hill Road provides critical bicycling access to a network of low-traffic, bicycling-friendly roads within and near Manassas Regional Airport, including Harry J Parrish Blvd. Wakeman Drive, Observation Drive, Piper Lane, Residency Road, Pennsylvania Avenue, Carolina Drive, and Gateway Blvd.

As such, Clover Hill Road is eminently useful for bicycle commuting to employment sites within and near the airport, to the Broad Run VRE station, and to points west in Bristow.  In addition, Clover Hill Road and the low-traffic roads within and around the airport are used extensively for recreational bicycling on evenings and weekends.

Bicyclists on Bull Run Bicycle’s Tuesday evening shop ride wait to cross Route 234 at Clover Hill Road. To avoid hazardous right-turning traffic on both sides of this intersection, the group waits for a green traffic signal in the left travel lane of Clover Hill Road.

Both City of Manassas roadways that connect to this segment of Clover Hill Road–i.e.. Clover Hill Road from Godwin Drive to Wellington Road and Godwin Drive from Clover Hill Road to Hastings Drive–already have conventional on-road bike lanes.  Thus, in addition to including sidewalks for pedestrians, the entire redesigned segment of Clover Hill Road should include conventional on-road bike lanes in both directions.

Note that VDOT’s website that describes bowtie intersections includes conventional on-road bike lanes on all four legs of that intersection (see the illustration copied below).

Since, as in the above illustration, the proposed design features dedicated right-turn-only lanes on Clover Hill Road at both approaches to the Prince William Parkway, it would be vital to install the bike lanes at both approaches to the Prince William Parkway between the straight-through travel lane on the left and the right-turn-only lane at the curb.

Within the roundabouts, the bike lanes–if any–should be on the far right and could be buffered or physically separated from roadway traffic.  Alternatively, especially if right-of-way is constrained at the roundabouts, the bike lanes could be discontinued within the roundabouts and bicyclists encouraged to navigate the roundabouts as either a driver centered within the travel lane or (using strategically placed curb ramps for access and egress) as a pedestrian using the sidewalk.

However, upon exiting each roundabout, right-turning motorists should be directed to yield to any bicycle traffic ahead and to carefully merge right across the continued bike lane to enter the emerging right-turn-only lane before reaching either the Parkway (along both southbound and northbound Clover Hill Road) or Godwin Drive (along northbound Clover Hill Road).

Please note that these same conflicts between right-turning motorists and straight-through bicyclists presently exist at the current Clover Hill Road/Route 234 Intersection in the absence of any bike lanes and that appropriate traffic engineering measures, involving pavement markings and signage, can optimize the safety of all road users.

Design This Intersection to Safely Accommodate the Future Shared-Use Path Along Route 234

Although this project won’t construct the long-planned missing shared-use path along Route 234, the design of this intersection should not preclude its future construction and should also ensure that pedestrians and bicyclists using that shared-use path can cross Clover Hill Road safely.  As a designated segment of the National Capital Trail Network, a continuous, high-quality shared-use path along Route 234 should be a priority for Prince William County.

Unobstructed right-of-way should be acquired and preserved as part of this project to accommodate the future Route 234 shared-use path, and the project design should ensure that the route and future design of this path would not be blocked or compromised by noise barriers, above-ground or buried utilities, or roadside signage, traffic signals, or street lighting.  Until the county decides whether this path will be constructed on the northeast or southwest side of Route 234, right-of-way should be reserved for the future shared-use path on both sides.

In addition, the intersection design should ensure that the future Route 234 Trail will have a safe, at-grade crossing of Clover Hill Road, presumably coordinated with the same traffic signal that regulates the Route 234 traffic.

Eliminate High-Speed Right-on-Red Turning Movements from Route 234 onto Clover Hill Road

Unlike VDOT’s model bowtie intersection illustrated above, the currently proposed intersection design incorporates two free-flowing, high-speed, right-turning movements, using pork-chop islands, for Route 234 traffic to enter Clover Hill Road.  We believe this currently proposed design feature would seriously endanger both 1) bicyclists and pedestrians crossing Route 234 at Clover Hill Road and 2) the users of the future Route 234 Trail crossing Clover Hill Road.

Vulnerable, non-motorized road and trail users who are crossing either roadway on a green traffic signal should not be endangered by high-speed traffic that is simultaneously turning right-on-red at near-freeway speeds at these pork-chop islands.  While a decision to completely ban all right-turn-on-red movements at this intersection might best be made by expert traffic engineers, we firmly believe that free-flowing right-on-red movements would be dangerous at this intersection and should not be promoted by design features such as pork-chop islands.

Instead, vehicle traffic entering Clover Hill Road from Route 234 should be encouraged to slow to the 25 MPH posted speed and carefully merge into the single travel lane approaching the roundabout, while bicyclists who have just crossed Route 234 on a green signal must merge into the bike lane at the right edge of the roadway.

Again, careful pavement marking and signing would help all road users safely negotiate these conflicts, whereas a design that promotes high-speed right-on-red vehicle traffic would endanger vulnerable road users.

Bicyclists and pedestrians crossing Route 234 at Clover Hill Road on a green traffic signal would primarily be endangered by motorists turning right-on-red from Route 234 at the far side of their crossing.  By contrast, users of the future Route 234 Trail crossing Clover Hill Road on a green traffic signal could encounter both motorists turning right-on-green from Route 234 as well as motorists turning right-on-red from Clover Hill Road.   All such right-turning movements would be safer if the design encourages motorists to slow or stop completely before entering a crosswalk and turning into the path of vulnerable road users.  Partial traffic signal phasing, such as leading pedestrian intervals, could also make these crossings safer.

Clover Hill Road is a local street posted for 25 MPH, and there is no compelling need to promote free-flowing right-turn-on-red vehicle movements onto Clover Hill Road.

The 2019 AADT for all connected local roadways (i.e., Clover Hill Road, Godwin Drive, and Harry J Parrish Blvd) ranges from 2100 to 4700, so Clover Hill Road only needs one travel lane per direction between intersections. The proposed design includes a grassy median along Clover Hill Road, but there’s no compelling need for a grassy median on a road posted for 25 MPH, and that grassy median is about a full-lane wide on the segment approaching Godwin Dr.

Active Prince William also supports the inclusion of a shared-use path along this entire segment of Clover Hill Road; however, such a path would not connect to any existing path along Clover Hill Road, Godwin Drive or Harry J. Parrish Blvd, and it appears that the long-planned path along the Route 234 Bypass won’t be built for the foreseeable future.  Thus, a shared-use path seems less essential, especially on the airport side of Route 234, provided that both sides of Clover Hill Road will have sidewalks and bike lanes.

If spatial or terrain constraints would otherwise preclude the addition of both on-road bike lanes and sidewalks along Clover Hill Road in both directions, consideration should be given to narrowing or eliminating the grassy medians.

Thank you for considering our input.


Our Comments on the Mathis Avenue Improvement Project

On March 31, 2022, Active Prince William submitted the following comments to the City of Manassas regarding its proposed Mathis Avenue Improvement Project:

Re: Mathis Avenue Improvement Project (T-086) Public Meeting Comments

On behalf of Active Prince William, I’m writing to submit the following comments in response to the March 17, public meeting for the above-referenced project.  Our all-volunteer organization seeks improved active mobility and public transportation throughout greater Prince William, to create more livable, equitable, and sustainable communities.

An Improved Public Process for Transportation Project Development

We sincerely appreciate the improved process used to involve the public at the 30% design stage for this capital transportation project, which included both a February 23 virtual public meeting and an in-person meeting held on March 17.  This public involvement process is far better than the one used by City staff for its recent Sudley Road Third Lane Project, which excluded all public input before preliminary engineering was at least 90% complete (including when that project had been re-scoped substantially twice, in December 2017 and in February 2021).  We hope this public comment opportunity reflects a permanent policy change to proactively involve the public in all City transportation projects going forward, ideally starting at the project scoping stage.

The Proposed Design is a Reasonable Interim Aesthetic Improvement but Lacks Essential Pedestrian Amenities for a Vibrant, Mixed-Use Street

As a final condition for a revitalized Mathis Avenue as a mixed-use, pedestrian-oriented street–ideally with robust bus transit service–the proposed design would be a major disappointment.  However, as an interim improvement intended to transform the appearance of this somewhat desolate commercial street and to promote future mixed-use redevelopment at minimal cost, this project does appear to have merit.

In particular, the proposed design provides sidewalks that are too narrow for comfortable two-way walking, are too close to the roadway, and lack street trees and pedestrian-serving street furniture in what should be much wider curbside planting strips and furniture zones.   In addition, the sidewalks are interrupted with frequent curb cuts, where motor vehicle cross flows impede safe and comfortable walking.

However, considering the need for Mathis Avenue to continue serving the existing auto-oriented businesses beside it, especially along the east side of this street, until redevelopment occurs some years in the future, the imperative to minimize right of way takings and to preserve the existing curb cuts is understandable.

To effectively promote the specific forms of redevelopment that the City seeks and to ensure that this redevelopment incorporates the necessary mobility infrastructure to equitably support that redevelopment, the City’s Department of Planning and Community Development should undertake a robust community-based planning process to develop a detailed form-based zoning code for the Mathis Avenue corridor.  Form-base zoning codes are a proven tool to effectively promote the specific forms of redevelopment desired by localities.

Bicycling Accommodations and Roadway Design Speed

The lack of bike lanes (or any alternative bicycle facilities) in this project is disappointing but is also understandable since the existing curbs are not being moved to keep the existing storm sewer infrastructure in place, to minimize costs and commercial property impacts.  However, without bike lanes, the construction of raised medians will degrade bicycling conditions substantially, and those degraded conditions are unlikely to be remedied by a future roadway widening when the corridor is eventually redeveloped.

Presently, motorists can readily safely overtake people riding bicycles on Mathis Avenue by passing in the two-way central left-turn lane.  The raised medians, however, will prevent motorists from overtaking bicycle riders, who typically travel at 10-16 MPH.  Thus, people riding bicycles on Mathis Avenue will serve as slow-moving traffic-calming devices.  This roadway change will make bicycling unpleasant for nearly all riders and will subject people riding bicycles to increased harassment from frustrated motorists who are unable to pass.  Moreover, since Mathis Avenue would probably not be rebuilt with added bike lanes when redevelopment occurs in the future, this degradation of bicycling conditions on Mathis Avenue is likely permanent.

The fact that nearby Portner Avenue is designated as a bicycle route is no reason to degrade bicycling conditions on Mathis Avenue.  While many through bicyclists already prefer to travel on Portner Avenue, only Mathis Avenue serves the businesses and jobs located along Mathis Avenue, and people will someday live on this segment of Mathis Avenue too.

Thus, for both bicycle access and pedestrian safety, this project should strive to reduce the design speed for Mathis Avenue–and ideally the posted speed limit–to 20 MPH or below.   The raised median with street trees—and especially street trees in future curbside planting strips and future taller buildings closer to the roadway—should encourage motorists to drive more slowly on Mathis Avenue, but other design changes are needed too.

Shorter curb-return radii at corners and narrower sidewalk curb cuts would help reduce motor vehicle speeds, and electronic speed-feedback signs paired with posted speed limit signs (dynamic speed displays) would warn speeding motorists to slow down.  In addition, shared-lane markings (aka “sharrows”) centered in each travel lane would inform both motorists and bicycle riders that this is a shared roadway.

More Visible and Shorter Crosswalks

One notable design feature that should be changed is the proposed use of brick-colored stamped asphalt crosswalks.  While intended to impart historic charm, brown-colored crosswalks are far less conspicuous to motorists than modern high-visibility and reflective thermoplastic crosswalk markings.  The primary purpose of marked crosswalks is to alert motorists to the likely presence of crossing pedestrians, encouraging drivers to slow down, look for, prepare to yield to, and stop for pedestrians who may be crossing the roadway.  A faux-brick aesthetic is far less important than the safety of people who are walking across the street.

In addition, the final design of each intersection should pay particular attention to shortening the length of all crosswalks to the extent feasible and to install two separate curb ramps for the crosswalk landings at each corner.  The present design includes a single combined curb ramp at the southeast corner of Mathis Avenue and Sudley Road and at all four corners of Mathis Avenue and Liberia Avenue, the two on the north side not being rebuilt.

Designing shorter curb-return radii at all intersection corners, as suggested above to reduce the roadway design speed, would also reduce the crosswalk lengths at those intersections.

Consider Short Left-Turn Lanes at Reb Yank Drive and Carriage Lane

The advertised design does not include any space in the center of the roadway (beyond the intersection itself) to store vehicles waiting to turn left at Reb Yank Drive (from both directions) or southbound at Carriage Lane.  While shortening the raised medians to add short left-turn pockets at those three locations could increase travel speeds along Mathis Avenue and could also remove the proposed median refuges for crossing pedestrians at those unsignalized intersections, it may be prudent to add those left-turn pockets to smooth traffic flow, reduce traffic congestion, and lower the incidence of rear-end collisions at those locations.  However, if traffic studies have already documented that those left-turn pockets are unnecessary, then please retain them.

Thank you for considering our comments as you finalize the design of this project.

Our Comments on the Old Bridge Rd/Occoquan Rd Intersection Project

On February 3, 2022, the Prince William County Department of Transportation held a Design Public Hearing for its $11.85 million project to straighten the curve on Old Bridge Road near its intersection with Occoquan Road.   Below are Active Prince William’s written comments on the proposed design of that project.  View the public hearing brochure and the public hearing presentation to see the proposed design.

Active Prince William submits the following comments for the Design Public Hearing for the above-referenced project.  Our all-volunteer organization seeks improved active mobility and public transportation throughout greater Prince William, to create more livable, equitable, and sustainable communities.

Our concerns with the proposed design for this intersection-reconstruction project can be summarized as follows: 1) lengthened crosswalks, 2) inadequate replacement sidewalks, 3) lack of bicycling accommodations, and 4) excessive design speeds.

Although framed as a “safety improvement”, this project does little to make walking, bicycling, or transit access safer.  At the same time, this project would promote speeding and add unnecessary vehicle capacity.

According to the traffic crash reports compiled by the Virginia Department of Motor Vehicles, Prince William County experienced a total of 804 traffic crashes involving pedestrians or bicyclists during the past decade (2012-2021), resulting in 232 severe injuries and 53 deaths among people walking or bicycling.  Undoubtedly, the excessive design speeds on Prince William County’s multilane arterial roadways are largely responsible for this carnage affecting people walking and bicycling, while also causing many additional deaths and severe injuries to the drivers and occupants of motor vehicles.

According to VDOT’s 2019 traffic count data, Old Bridge Road (VA 641) had an AADT of 53,000 west of Occoquan Road and an AADT of 45,000 east of Occoquan Road, whereas Occoquan Road (VA 906) had an AADT of 13,000 south of Old Bridge Road and an AADT of 2800 north of Occoquan Road.  However, those traffic volumes will likely decrease once the southbound bottleneck on I-95 south of Mile-Marker 160 is fixed.

Lengthened Crosswalks

The proposed design would lengthen all three marked crosswalks at this intersection.  With the added right-turn lane on eastbound Old Bridge Road, the Old Bridge Road crosswalk would become eight lanes wide.  The crosswalk across the southern leg of Occoquan Road would remain six lanes wide, and the crosswalk across the northern leg of Occoquan Road would now cross four lanes of traffic, including the separated right-turn pocket from westbound Old Bridge Road.

To help mitigate the adverse impacts of those longer crosswalks, the design should create protected median pedestrian refuges in each crosswalk.  In addition, whenever pedestrian crossing signals are activated, leading pedestrian intervals should be triggered to give the crossing pedestrians a head start over both right-turning and left-turning vehicles.

Moreover, serious consideration should be given to not adding right-turn lanes on eastbound Old Bridge Road and/or southbound Occoquan Road and to eliminating one or two of the existing turn lanes on northbound Occoquan Road.

On eastbound Old Bridge Road, the existing curb lane approaching Occoquan Road should be redesignated for right turns only, rather than adding a new right-turn-only lane.  The VDOT traffic data show that the Old Bridge Road leg east of Occoquan Road carries 8,000 fewer vehicles/day than the Old Bridge Road leg west of Occoquan Road, indicating that two eastbound straight-through lanes are sufficient at that location.

On southbound Occoquan Road, which carries only 2800 vehicles/day, a short right-turn pocket with a pork chop island pedestrian refuge could be created as an alternative to the proposed new right-turn-only lane.

On northbound Occoquan Road, one of the two existing left-turn-only lanes could be eliminated and/or the right-turn lane replaced with a short right-turn pocket with a pork chop island pedestrian refuge.

The overall objective should be to shorten, not lengthen, the three existing crosswalks.  

 Inadequate Replacement Sidewalks

The proposed replacement sidewalks, along both sides of both roads, are only five feet wide and separated from the roadway by only a four-foot-wide grass buffer.  While this does represent a modest improvement over the existing deficient sidewalks, the replacement sidewalks should be both wider and separated farther from the roadway.

Walking just four feet away from a busy multilane roadway is noisy and unpleasant, and five-foot-wide sidewalks do not comfortably accommodate two-way pedestrian traffic or walking two abreast.

Furthermore, in winter, snow and ice plowed onto such narrowly buffered sidewalks from the adjacent roadway can render such sidewalks impassable for many days and weeks.  In the summer heat, the absence of street trees growing within a viable tree-planting strip makes walking without shade miserable.

In addition, the proposed sidewalks are devoid of much-needed pedestrian amenities such as benches, pedestrian-scale streetlights, and bus shelters.

The realignment of Old Bridge Road will abandon much of the existing roadway along the south side of that road.  That abandoned roadway provides ample right of way to build a wider and better-separated replacement sidewalk at that location.

For future projects, the County should revise its road-design standards to provide better pedestrian accommodations.

Lack of Bicycling Accommodations

Old Bridge Road and Occoquan Road both lack bicycling accommodations, so they are not Complete Streets.  Without even a sidepath (a wide sidewalk intended for both bicycling and walking), these roadways should be restriped or rebuilt with at least conventional (striped) on-road bicycle lanes.

Besides improving bicycling conditions, conventional on-road bicycle lanes enhance the pedestrian environment by increasing the separation between the sidewalk and vehicle traffic and by shortening pedestrian crossings of the vehicle lanes at intersections.

Old Bridge Road has overly wide 12-foot travel lanes, the width used on Interstate highways with 70+ MPH design speeds.  Thus, bike lanes could easily be retrofitted on Old Bridge Road at any time, simply by restriping its six 12-foot-wide travel lanes as six 11-foot-wide travel lanes and reallocating the freed-up space for bike lanes.  When added to the existing two-foot-wide concrete gutter pans, the freed-up space would produce five-foot-wide bicycle lanes, meeting the AASHTO minimum width.  Some additional space for bike lanes (or wider medians) could be created by narrowing all left- and right-turn lanes to 11 feet as well.

Since Occoquan Road has only 11-foot lanes, narrowing those lanes to create bike lanes—while still somewhat feasible—might not be approved by VDOT.  However, it is readily feasible to modify the current project to redesign the rebuilt north leg of Occoquan Road to incorporate five-foot bike lanes in both directions.

The south leg of Occoquan Road has at least four travel lanes between Old Bridge Road and US-1 yet had an AADT of only 13,000 in 2019.  This roadway is thus a prime candidate for a four-lane to three-lane road diet, producing a roadway with only one travel lane per direction, a two-way left-turn lane in the center, and two one-way bicycle lanes.

Such roadway reconfigurations, if managed by VDOT during scheduled roadway resurfacing, are highly cost effective and are accomplished at no cost of the County.  Prince William County should coordinate with VDOT to retrofit bike lanes on the entirety of Old Bridge Road and of Occoquan Road whenever those roadways are next scheduled for periodic resurfacing.  If either roadway is reconfigured before the current project is completed, the current project should ensure that those bike lanes are incorporated into the final roadway striping plan for the rebuilt segment.

Excessive Roadway Design Speeds

At the public hearing, project staff reported that the proposed design would preserve the present 35 MPH posted speed limit on Old Bridge Road and aims for a 40 MPH design speed.  Those speeds are too high for an arterial roadway through a commercial corridor with nearby residential neighborhoods and a large park-and-ride facility.

Project staff also noted the traditional highway engineering practice of posting speed limits based on the observed speeds of the motorists that use the roadway (i.e., the 85th percentile speed).  Such an antiquated and dangerous practice is the opposite of a safe systems approach; namely, engineers should select roadway design speeds and standards that allow pedestrians and bicyclists to survive most collisions with motor vehicles.

Narrowing the lanes on Old Bridge Road to 11 feet (or less) would be one simple step to reduce the excessive design speed on this roadway.  In addition, the curb-return radii at all corners of this intersection should be reduced to conform to the 30 MPH design speed that is appropriate for this roadway.

Thank you for considering our comments as you finalize the design of this project.


Allen Muchnick and Mark Scheufler, co-chairs Active Prince William


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