County of Los Angeles Department of Public Works

The NTMP provides four basic categories of tools to apply to any given project. These are as follows:

Tools to Address Speeding
Tools to Address Traffic Volume
Tools to Address Pedestrian Safety
Tools to Address Reducing Vehicle Collisions

The following tables list the measures available and show their relative effectiveness and restrictiveness for each category:

Click on the Toolbox Item of Interest for detailed information

Legend Ranking Color Codes and Numbers
High Effectiveness	1
Moderate Effectiveness	2
Average Effectiveness	3
Minimal Effectiveness	4
Low to Zero Effectiveness	5
No Data Available	N/A

Tools to Address SPEEDING
Based on Published Sources.

Toolbox Item	Level of Restrictiveness	Speed Reduction Effectiveness Ranking
Enforcement (Visible & Active Police Presence)	Low	2
Radar Trailer	Low	3
Speed Alert with Warning	Low	3
Neighborhood Traffic Safety Campaign (Education)	Low	5
Raised Crosswalk (3" h x lane width)	Some	1
Speed Cushions	Some	1
Speed Humps (2-5/8" x 12')	Some	1
22' Tables	Some	1
Raised Intersections	Some	1
Textured Pavement	Some	3
Center Island Narrowing	Some	4
Chicanes	Moderate	1
Chokers/Slow Points	Moderate	1
One-Way Entry/Exit Chokers, Half Closures, Semi Diverters	Moderate	1
Traffic Circles	Moderate	1
Bulb-outs	Moderate	3
Full Closures, Cul-de Sacs	High	1
Full/Diagonal Diverters	High	2
Forced Turn Islands, Barriers, Channelization	High	2

Tools to Address TRAFFIC VOLUMES
Based on Published Sources.

Toolbox Item	Level of Restrictiveness	Volume Reduction Effectiveness Ranking
One-Way Streets and Signs	Low	1
Turn Restriction Signs	Low	1
Turn Prohibition Signs	Low	1
Raised Crosswalk (3" h x lane width)	Some	3
Speed Cushions	Some	3
Speed Humps (2-5/8" x 12')	Some	3
22' Tables	Some	3
Raised Intersections	Some	5
Textured Pavement	Some	3
Center Island Narrowing	Some	5
Chicanes	Moderate	1
Chokers/Slow Points	Moderate	1
One-Way Entry/Exit Chokers, Half Closures, Semi Diverters	Moderate	1
Bulb-outs	Moderate	3
Median Barriers	Moderate	1
Curb Extensions (Entry, Exit, Mid-Block)	Moderate	5
Full Closures, Cul-de Sacs	High	1
Full/Diagonal Diverters	High	1
Forced Turn Islands, Barriers, Channelization	High	1
Traffic Circles	High	3

Tools to Address PEDESTRIAN SAFETY
Based on Published Sources.

Toolbox Item	Level of Restrictiveness	Pedestrian Safety Effectiveness Ranking
Enforcement (Visible & Active Police Presence)	Low	N/A
Radar Trailer	Low	N/A
Speed Alert with Warning	Low	N/A
Neighborhood Traffic Safety Campaign (Education)	Low	4
Raised Crosswalk (3" h x lane width)	Some	3
Speed Cushions	Some	N/A
Speed Humps (2-5/8" x 12')	Some	N/A
22' Tables	Some	N/A
Raised Intersections	Some	N/A
Textured Pavement	Some	N/A
Center Island Narrowing	Some	N/A
Stop Signs	Moderate	N/A
Turn Restriction Signs	Moderate	N/A
Chicanes	Moderate	N/A
Chokers/Slow Points	Moderate	1
One-Way Entry/Exit Chokers, Half Closures, Semi Diverters	Moderate	N/A
Bulb-outs	Moderate	3
Median Barriers	Moderate	N/A
Curb Extensions (Entry, Exit, Mid-Block)	Moderate	N/A
Turn Prohibition Signs	High	N/A
Full Closures, Cul-de Sacs	High	N/A
Full/Diagonal Diverters	High	N/A
Forced Turn Islands, Barriers, Channelization	High	N/A
Traffic Circles	High	4

Tools to Address REDUCING VEHICLE COLLISIONS
Based on Published Sources.

Toolbox Item	Level of Restrictiveness	Vehicle Collision Reduction Ranking
Enforcement (Visible & Active Police Presence)	Low	N/A
One-Way Streets and Signs	Low	1
Radar Trailer	Low	N/A
Speed Alert with Warning	Low	N/A
Neighborhood Traffic Safety Campaign (Education)	Low	N/A
Raised Crosswalk (3" h x lane width)	Some	N/A
Speed Cushions	Some	N/A
Speed Humps (2-5/8" x 12')	Some	1
22' Tables	Some	1
Raised Intersections	Some	N/A
Center Island Narrowing	Some	1
Stop Signs	Moderate	N/A
Turn Restriction Signs	Moderate	N/A
Chicanes	Moderate	1
Chokers/Slow Points	Moderate	N/A
One-Way Entry/Exit Chokers, Half Closures, Semi Diverters	Moderate	1
Bulb-outs	Moderate	1
Median Barriers	Moderate	1
Curb Extensions (Entry, Exit, Mid-Block)	Moderate	N/A
Turn Prohibition Signs	High	1
Full Closures, Cul-de Sacs	High	1
Full/Diagonal Diverters	High	1
Forced Turn Islands, Barriers, Channelization	High	1
Traffic Circles	High	1