If pedestrian activity is expected, see .

If pedestrians are not an issue, the following guidelines may be used:

Angle of Entry -

In rural areas, the angle of entry between the slip lane and the cross street is typically flatter than in urban areas to facilitate high-speed turns.

Radius -

For guidance on radius design for different vehicle classes, see . A design speed that is appropriate for the turning movement should be used to determine the combination of radius and superelevation for the right turn.

Channelizing Island -

The channelizing island may be flush with the pavement or depressed.

Careful consideration should be made in rural areas for the use of curbed islands, particularly along high-speed facilities and at isolated intersections. If curbs are installed, they should be sloped and offset from the traveled way, and islands should be made clearly visible to motorists. Refer to Chapter 9 of for design guidance on curb offset and tapering ( ). For details on island approach treatment and delineation refer to Chapter 3 of the and Chapter 9 of .

Deceleration Lane –

Refer to Chapter 2 of TxDOT’s for volume thresholds for installing deceleration lanes. See in this manual for design guidance for deceleration lanes.

Acceleration Lane –

Refer to Chapter 2 of TxDOT’s for volume thresholds for installing acceleration lanes. These lanes provide a benefit when right-turn volumes are especially high and/or the speed differential between turning vehicles and vehicles on the cross street is large. Acceleration lanes provide benefits to motorists by allowing them to reach a higher speed prior to merging but they may increase sideswipe crashes. Acceleration lanes have been found to be preferred by elderly drivers at high-speed intersection locations. See for design recommendations for acceleration lanes for two-lane and multi-lane rural highways, respectively.

Lighting -

Intersections with channelization should be illuminated.