EXHIBIT 2

HALLANDALE BEACH BLVD. AND DIXIE HIGHWAY INTERSECTION

SUMMARY OF LANE AND SIGNAL MODIFICATIONS

In September of 2009 BrowardCounty in conjunction with FDOT installed a temporary modification to the lane configuration and signal timing at the above intersection. The scope of the change was to reduce from 3 lanes to 2 lanes the eastbound traffic lanes from W 2nd Ave to Dixie Highwayto add a dedicated EB left turn lane onto NE 1st Ave.and to change the signal cycles from 6 to 4 to increase the green light time for E/W traffic flow as noted in this email and the attached plans.

“During the last 8 months, Broward County Traffic Engineering and FDOT Traffic Operations have been working together on a plan to alleviate the existing eastbound and westbound Hallandale Beach Boulevard traffic backups approaching Dixie Highway. We believe that the best solution is to modify the existing Hallandale Beach Boulevard signals at Dixie Highway and NE 1st Avenue to allow the eastbound and westbound traffic to flow concurrently (green light at the same time) instead of separately.

To accomplish this, we plan to eliminate the eastbound Hallandale Beach Boulevard to northbound NE 1st Avenue shared left & through lane and replace it with an exclusive left-turn lane. This option would reduce the number of eastbound travel lanes from three to two. Our model analysis shows that the westbound traffic backup would be eliminated and that there would be a significant traffic backup reduction in the eastbound direction.”

The following table summaries the before and afterof the two main traffic parameters that a motorist would notice or be interested in: queuing and delay per vehicle.

Definitions:

  • Total Delay: This equals the travel time minus the travel time with no obstructions (times the number of vehicles).
  • Delay/Vehicle: Total Delay divided by total number of vehicles. NOTE: this is not the amount of time that can be expected to get through the signal. Instead, it is an indication of the per vehicle delay or “friction” that vehicle encounters as part of a wave of vehicles moving through the signal.
  • Queue: Average Length of back up in each lane. Note: Some models assume 19.5 feet per vehicle while others assume 25 feet per vehicle of space. The model I used is the 19.5 feet version.
  • NOTES: This does not portray the effects of rail activity, assumes 10% of the vehicles are heavy vehicles and 90% cars.

Using both the 19.5 and 25 feet spacing, the average queues and number of cars come out as follows for Eastbound:

Scenario / AM Peak / MiddayPeak / PM Peak
Previous Delay/Vehicle / 427 sec/veh / 453 sec/veh / 52 sec/veh
Previous Queue (19.5 ft/car) / 959 ft (50 cars) / 958 ft (50 cars) / 297 ft (15 cars)
Previous Queue (25 ft/car) / 1250 feet / 1250 feet / 375 feet
Current Delay/Vehicle / 32 sec/veh / 34 sec/veh / 22 sec/veh
Current Queue (19.5 ft/car) / 548 ft (28 cars) / 453 ft (23 cars) / 238 ft (12 cars)
Current Queue (25 ft/car) / 700 feet / 575 feet / 300 feet

Here are the results for Westbound:

Scenario / AM Peak / MiddayPeak / PM Peak
Previous Delay/Vehicle / 518 sec/veh / 59 sec/veh / 54 sec/veh
Previous Queue (19.5 ft/car) / 869 ft (45 cars) / 361 ft (19 cars) / 424 ft (22 cars)
Previous Queue (25 ft/car) / 1125 feet / 463 feet / 543 feet
Current Delay/Vehicle / 30 sec/veh / 18 sec/veh / 19 sec/veh
Current Queue (19.5 ft/car) / 205 ft (11 cars) / 157 ft (8 cars) / 211 ft (11 cars)
Current Queue (25 ft/car) / 275 feet / 201 feet / 271 feet

Comments

A. The initial conditions assessment was done in December of 2008, prior to the conversion and the post modification assessment was done in March of 2010.

B. This is thru peak season so counts are comparable.

C. Based on police updates to the CAD there have been no impacts to the accident data for the area. A copy of the accident summary is attached.

D. There is no way to tell if drivers are using alternate routes to avoid the area.

E. We had the County provide new Peak Hour vehicle volume data and it is attached. Based on the eastbound/westbound AM and PM volumes on HBB, 3 out of 4 directions show increased volumes after the change.

Based on the above information Staff recommends making the permanent changes to this configuration.