Roadway Design Manual: Freeways - Texas Department of Transportation
Exit Ramp Deceleration Lane from Freeway. The deceleration lane associated with exit ramps from freeways is sometimes preceded by a tapered section of roadway. It begins where the speed change lane is 12-ft wide and ends at Point A.
Chapter 5 - Freeway Management and Operations Handbook
5.4.2 Speed-Change Lanes. Drivers leaving a freeway at an interchange are required to reduce speed as they exit on a ramp. Drivers entering a freeway accelerate until the desired highway speed is reached.
Freeway Entrances and Exits - UpCodes
When an exit must be located where physical restrictions to visibility cannot be corrected by cut widening or object removal, an auxiliary lane in advance of the exit should be provided. The length of auxiliary lane should be a minimum 600 feet, 1,000 feet preferred.
Section 3 - AASHTO Models for Freeway Entrance and Exit …
The ratio . . . multiplied by the length (on level) . . . gives the length of speed-change lane on grade. 3.2 Freeway Mainline Exit Terminals At least since the 1965 Blue Book, and still in the 2004 Green Book, AASHO/AASHTO policies have used a basic two-step process for establishing design criteria for exit ramps.
Freeway Signing Handbook: Roadway Interchange Signing
Right-Lane Exits. Figure 5-1 through Figure 5-5 illustrate freeway guide signing for interchanges where exit lanes are on the right side of the freeway. Each of the figures includes Advance Guide, Exit Direction, and Exit Gore signs.
Acceleration and Deceleration Lanes - Transportation Policy …
Acceleration/deceleration lanes on freeway interchange ramps can reduce congestion by creating specific areas for merging traffic to speed up and exiting traffic to slow down. These lanes reduce the stop-and-go effects and collisions caused by slower traffic on interchanges.
Chapter 3. Interchanges | FHWA - Federal Highway Administration
At major freeway interchanges and route splits, route shield markings should be used in the lanes approaching the split to guide drivers to the correct approach lane (see Figure 50). The placement of this type of marking should be just prior to the location of the advance guide signs.
Designing Complex Interchanges | FHWA - Federal Highway …
Highway designers achieve lane balance configurations through the appropriate use of auxiliary lanes and optional lanes. An optional lane on the approach to an interchange allows the driver the choice of exiting or staying on the through route.
Chapter 2E - MUTCD 2009 Edition - FHWA - Transportation
Overhead Arrow-per-Lane or Diagrammatic guide signs (see Sections 2E.21 and 2E.22) shall be used for freeway splits with an option lane and for multi-lane freeway-to-freeway exits having an option lane.
acceleration lanes allow cars that are joining the main road to speed up to match the flow of traffic. Auxiliary lanes are another form of acceleration/deceleration lanes. These lanes continue a freeway entrance ramp into an additional freeway lane; this becomes an “exit only” lane at the next downstream exit. Using