Initiative 5: Removal of Geometric Constraints at Intersections

Removal of Geometric Constraints at Intersections
Description: Improvements to the geometric design at intersections to better accommodate trucks in areas with high truck traffic and in truck routes
Targeted mode: All traffic Geographic scope: Point
Type of initiative: Infrastructure management: minor improvements Primary objective: Improve inadequate infrastructure/ enhance safety
Expected costs and level of effort to implement: A cautious cost-benefit analysis is required. Cost to update design standards at intersections is minimal.  Implementation costs vary, but are often high.
Advantages:

  • Enhances safety
  • Reduces congestion
  • Reduces infrastructure damage
  • Low to no probability for unintended consequences
Disadvantages:

  • May require high to low capital investments
  • May require moderate implementation times
  • May conflict with pedestrian traffic
  • May impact private-sector locations
Examples:

  • AASHTO standards (AASHTO 2001)
  • Swept Path: Amount of roadway space that truck needs to make to turn without hitting something (U.S. Department of Transportation 2000).

Initiative-5 image

Swept path
Source: U.S. Department of Transportation 2000)

Related alternatives: 1. Freight Parking and Loading Zones; 2. Vehicle Size and Weight Restriction; 3. Truck Routes
References: Fambro et al. 1988; Hummer et al. 1988; Ogden 1992; Mason Jr et al. 1993; Harkey et al. 1996; Harwood et al. 1999; AASHTO 2001; Fitzpatrick and Wooldridge 2001; Garber S et al. 2008

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